Frequently asked questions

    Steel fabrication questions, answered

    Direct answers about Kothari Chemicals (Engineering Division): approvals, capacity, process, projects and how to evaluate a fabricator. Figures are company-stated capabilities; confirm current availability and scope for each enquiry.

    Company and trust

    What is Kothari Chemicals (Engineering Division)?

    Kothari Chemicals (Engineering Division) is a steel fabrication company in Bhilai, Chhattisgarh, India. It fabricates bridge girders, heavy structural steel, technological structures, power-plant structures and project-specific equipment from customer drawings. The company lists its major activity as manufacturing. It serves railway, bridge, power, steel, mining, cement and heavy industrial customers.

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    What legal name appears on the RDSO registration for Kothari Chemicals?

    The RDSO registration names the registered entity as Kothari Chemicals. The registration ID is CBS/G/Reg/Kothari Chemicals. The operating name Kothari Chemicals (Engineering Division) is the name the company uses on its website and in its profile. Use the legal name and registration ID when checking tender eligibility.

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    How do I tell this Kothari company apart from other companies with the Kothari name?

    Check three identifiers against the registration documents: the works address, Plot No. 3, Heavy Industrial Area, Hathkhoj, Bhilai - 490026; the RDSO registration ID CBS/G/Reg/Kothari Chemicals; and the Udyam number UDYAM-CG-05-0000352. Kothari Chemicals (Engineering Division) lists these identifiers in its company profile. Matching all three gives a firm basis for confirming identity before a purchase or tender decision.

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    When was Kothari Chemicals (Engineering Division) founded?

    Kothari Chemicals (Engineering Division) states that it was founded in 1990, and it describes its experience as 25+ years. Its statutory records carry separate dates. The RDSO and MSME dossier gives 15 April 2010 for incorporation or establishment details, and 21 August 2020 for MSME registration. These later registration dates do not replace the 1990 founding year.

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    Where is Kothari Chemicals (Engineering Division) located?

    The works is at Plot No. 3, Heavy Industrial Area, Hathkhoj, Bhilai - 490026, Chhattisgarh, India. The total works area is 9.5 acres, made up of Unit I at 3 acres and Unit II at 6.5 acres. Buyers who need the current approved layout, for example where land or covered area is part of eligibility, should request it from the company.

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    What are the phone numbers and email addresses for Kothari Chemicals (Engineering Division)?

    The landline is +91 788 2974 016 and the mobile is +91 93022 91000. General enquiries can be sent to [email protected]. Management correspondence can be sent to [email protected]. For a useful technical response, include drawings, bill of quantities, steel grade, governing codes, welding and NDT scope, delivery location and target schedule.

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    Is Kothari Chemicals (Engineering Division) RDSO-approved?

    Yes. Kothari Chemicals (Engineering Division) is RDSO-approved for fabrication of Composite Girder and other Steel Plate Girders, including open-web, FOB and ROB girders. The registration ID is CBS/G/Reg/Kothari Chemicals, the approval date is 26 March 2024, and the listed validity runs through 31 January 2031. The approval covers this scope only, so confirm the category each tender requires.

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    How can I verify the RDSO approval of Kothari Chemicals on IREPS?

    Check the registration on the Indian Railways IREPS portal at ireps.gov.in, under Approval of Vendors (UVAM). Confirm the registration ID CBS/G/Reg/Kothari Chemicals, the registered entity Kothari Chemicals, and the applicable category. The listed validity is through 31 January 2031, but the live IREPS record is the reference for current tender eligibility.

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    Does every bridge project need RDSO approval?

    No. Whether RDSO approval is required depends on the project owner, the tender and the governing specification. Indian Railway work commonly requires the applicable current RDSO registration and inspection process. Road or industrial bridges may be governed by different requirements. Buyers should confirm the governing document before choosing a fabricator.

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    Is Kothari Chemicals (Engineering Division) ISO 9001:2015 certified?

    Yes. The company's ISO 9001:2015 certificate number is 305026010110Q, issued by Quality Research Organization (QRO) / QRO Certification LLP. The certification date is 1 January 2026 and the certificate expires on 31 December 2028, with surveillance due on 31 December 2026 and 31 December 2027. The listed scope is manufacture of heavy building structures, technological structures, bridges and girders.

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    What is the Udyam number and MSME classification of Kothari Chemicals?

    The Udyam number is UDYAM-CG-05-0000352. The entity is classified as a Small Industry under MSME. The MSME registration date is 21 August 2020, which is separate from the company's stated founding year of 1990. Buyers can match this Udyam number against the company's registration documents when checking supplier eligibility.

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    Does Kothari Chemicals (Engineering Division) have a factory licence?

    Yes. The company lists factory licence number 2106/2106/B-17/DRG/2m(I), issued by the Government of Chhattisgarh. The licence is valid until 31 December 2030 and was renewed on 11 November 2025. Buyers should request a copy of the current licence during supplier qualification.

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    Is Kothari Chemicals (Engineering Division) a SAIL ancillary unit?

    Yes. Kothari Chemicals (Engineering Division) holds SAIL ancillary unit status for Bhilai Steel Plant, and the status is valid. It is listed on the About page. Buyers can confirm it with Steel Authority of India Limited (SAIL) where their process requires it.

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    Who leads Kothari Chemicals (Engineering Division)?

    Padam Kothari is Chief Executive Officer, with a B.Com and an MBA and 25+ years of experience. Bhimendra Gaidhane is General Manager - Works, with a BE in Mechanical Engineering and 19+ years of experience. Makarand Shankar Hande is General Manager - Production, with a diploma in Mechanical Engineering and 14+ years of experience. Deepak Kumar Pandey is Assistant General Manager - Quality Control, with a BE in Mechanical Engineering and 13+ years of experience.

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    Who owns Kothari Chemicals (Engineering Division)?

    The company lists its ownership as a private proprietorship, with Gyan Chand Kothari as proprietor. Padam Kothari serves as Chief Executive Officer. Ownership details should be confirmed against the registration documents for any formal supplier or tender check.

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    Is Kothari Chemicals a manufacturer or a trader?

    Kothari Chemicals (Engineering Division) is a manufacturer. It fabricates bridge girders, heavy structural steel and technological structures from customer drawings at its own works in Bhilai, Chhattisgarh. Steel and bought-out items are procured to the approved specification for each job.

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    Which industries and clients does Kothari Chemicals (Engineering Division) work with?

    The company serves Indian Railways, highway and road bridges, power generation, iron and steel plants, mining, cement and process plants, industrial buildings, and public-sector and EPC infrastructure projects. Past project records include BHEL, Shree Balaji Engicons Pvt. Ltd., Jhajharia Nirman Limited and Sunil Kumar Agrawal. A past-project reference does not imply current endorsement.

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    Does Kothari Chemicals (Engineering Division) have a Hindi website?

    Yes. The company's Hindi pages are at kotharisteel.com/hi/ and keep the same layout as the English site, with the visible information translated for Hindi-speaking users. English remains the primary language of the website. Both versions describe the same company.

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    How long does Kothari Chemicals (Engineering Division) take to dispatch an order?

    There is no universal lead time. Dispatch times vary with project complexity, including engineering release, steel availability, member size, welding and NDT, coating, inspection hold points and transport permissions. A committed programme is set only after the complete RFQ has been reviewed.

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    What certificates and approvals does Kothari Chemicals (Engineering Division) hold?

    Kothari Chemicals (Engineering Division) holds ISO 9001:2015 quality management system certification, RDSO approval (registration ID CBS/G/Reg/Kothari Chemicals), an environmental consent certificate and a factory licence certificate. Buyers should ask for current copies and check validity dates before award.

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    What is the GSTIN of Kothari Chemicals (Engineering Division)?

    The GSTIN of Kothari Chemicals (Engineering Division) is 22AETPK2241N1ZA. Buyers can confirm it on the GST portal before raising a purchase order. Kothari Chemicals is the legal entity name used in the RDSO record.

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    Can I visit the Kothari Chemicals works in Bhilai?

    Yes. Buyers and inspectors can arrange a visit to the works at Plot No. 3, Heavy Industrial Area, Hathkhoj, Bhilai by emailing [email protected], calling +91 788 2974 016 or +91 93022 91000, or using the contact form on the website.

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    Does Kothari Chemicals have its own NABL-accredited laboratory?

    No. Laboratory and specialist testing is outsourced. Radiography, UT and PAUT go to qualified external agencies, and physical, chemical and mechanical tests go to NABL-accredited laboratories. Dimensional, visual, DPT and MPI checks are done in house.

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    Services, industries and projects

    What types of bridge girders does Kothari Chemicals (Engineering Division) make?

    Kothari Chemicals (Engineering Division) fabricates composite girders, steel plate girders, open-web girders, road-over-bridge (ROB) girders, foot-over-bridge (FOB) girders and railway bridge members. Its RDSO registration covers Composite Girder and other Steel Plate Girders, including open-web, FOB and ROB girders. Scope can include studs, rivets, trial assembly, blasting, metalizing, painting, marking, packing and transport to an agreed boundary.

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    Is Kothari Chemicals RDSO approved for bridge girders?

    Yes. Kothari Chemicals (Engineering Division) is RDSO approved for fabrication of Composite Girder and other Steel Plate Girders, including open-web, FOB and ROB girders. The registration ID is CBS/G/Reg/Kothari Chemicals, the registered entity is Kothari Chemicals, and the approval is dated 26 March 2024 with listed validity through 31 January 2031. Buyers should check current status on the IREPS portal under Approval of Vendors (UVAM) before each tender.

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    Does Kothari Chemicals build railway bridge girders to RDSO drawings?

    Yes. The company's executed-work register records two 24 m composite-girder spans at NTPC Tamnar, totalling 96 MT, fabricated to an RDSO drawing for Shree Balaji Engicons Pvt. Ltd. Kothari Chemicals (Engineering Division) also records railway composite-girder work for MCVL-Handidua. These are completed past projects, not current endorsements, and each tender depends on the applicable RDSO category, drawings and inspection stages.

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    Is RDSO approval required for every railway or road bridge?

    No. Whether RDSO approval applies depends on the owner, the tender and the governing specification. Indian Railway work commonly requires the applicable current RDSO registration and inspection process. Road or industrial bridges may follow different requirements. Kothari Chemicals (Engineering Division) advises buyers to confirm the governing documents before enquiry.

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    Does Kothari Chemicals fabricate open-web girders?

    Yes. The RDSO scope of Kothari Chemicals (Engineering Division) includes open-web girders. Its executed-work register records ten spans of 30.5 m open-web girders, including rivets, totalling 250 MT for NTPC Lara, fabricated for Shree Balaji Engicons Pvt. Ltd. This is a completed project record, not a current endorsement. Enquiries should state span, drawings, steel grade and inspection requirements.

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    Does Kothari Chemicals make FOB girders with blasting, metalizing and painting?

    Yes. Kothari Chemicals (Engineering Division) has completed FOB girder work that included fabrication, blasting, metalizing, painting and supply up to site. The executed-work register records 50 MT of FOB girders supplied up to Kapan station and another 50 MT supplied up to IB station, both for Sunil Kumar Agrawal. These are completed records, and coating systems are set per project specification.

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    Has Kothari Chemicals built road over bridge (ROB) girders?

    Yes. The executed-work register records a 24 m road-over-bridge at Kusmunda, Chhattisgarh, of 195 MT, with studs and painting, for SECL through Jhajharia Nirman Limited. A separate 18 m road-over-bridge of 52 MT for the same client is also recorded. Kothari Chemicals (Engineering Division) lists ROB girders within its bridge scope, and these are completed past projects.

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    What is the maximum single-piece lifting capacity at Kothari Chemicals?

    Kothari Chemicals (Engineering Division) states single-piece handling up to 100 metric tonnes, supported by multiple 50 T cranes at its Bhilai works. Each lift is reviewed for geometry, centre of gravity, rigging, travel path and resource availability. These figures describe maximum stated capability, not immediate slot availability, so crane configuration and production load are confirmed for each package.

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    How large is the Kothari Chemicals fabrication works in Bhilai?

    The Kothari Chemicals (Engineering Division) works in Bhilai covers 9.5 acres across two units. Unit I is 3 acres and Unit II is 6.5 acres. Covered concrete-floor areas include 30,100 sq ft and 26,050 sq ft in Unit I, and 30,400 sq ft in each of two Unit II areas. Buyers needing land or covered-area evidence should request the current approved layout.

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    Does Kothari Chemicals fabricate heavy structural steel and technological structures?

    Yes. Kothari Chemicals (Engineering Division) fabricates heavy structural members, technological structures, power-plant structures and project-specific equipment from project drawings. Its ISO 9001:2015 certificate scope lists heavy building structures, technological structures, bridges and girders. Work can include CNC cutting, drilling, fit-up, welding, straightening, machining, inspection and dispatch.

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    Does Kothari Chemicals make power plant structures?

    Yes. Kothari Chemicals (Engineering Division) lists power-plant structures among its fabrication work, and its executed-work register includes a 10,000 MT heavy fabrication programme for BHEL Trichy. Each power-plant package is evaluated against drawings, materials, tolerances, welding, NDT, coating, handling and logistics. Past projects are completed records and do not imply current endorsement by any client.

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    How much steel did Kothari Chemicals fabricate for BHEL Trichy?

    Kothari Chemicals (Engineering Division) completed a 10,000 MT heavy fabrication programme for BHEL Trichy in FY 2025-26. The work covered heavy fabricated steel components made to project drawings, inspection requirements and delivery schedules. It is a completed past programme and does not imply a current BHEL endorsement.

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    What composite girder spans did Kothari Chemicals make for Pasan-Gevra-Pendea?

    For the Pasan-Gevra-Pendea project, Kothari Chemicals (Engineering Division) records three 24 m composite-girder spans totalling 229 MT, and two 30 m composite-girder spans totalling 205 MT, both for Shree Balaji Engicons. These are completed project records. Buyers should check the current specification and inspection requirements for any new enquiry.

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    What girders did Kothari Chemicals make for MCVL-Handidua?

    The executed-work register records three MCVL-Handidua packages for Shree Balaji Engicons Ltd. They are four 36 m railway composite-girder spans in five leaves at 210 MT, one 36 m composite plate-girder span at 203 MT, and two 19.25 m composite plate-girder spans at 114.4 MT. Kothari Chemicals (Engineering Division) records these as completed past projects.

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    Which clients has Kothari Chemicals (Engineering Division) worked with?

    Project records list BHEL, Shree Balaji Engicons Pvt. Ltd., Jhajharia Nirman Limited and Sunil Kumar Agrawal, along with NTPC-, South Eastern Coalfields (SECL)- and MCL-linked works. Kothari Chemicals (Engineering Division) presents these as completed past references, not current endorsements. The clients page gives the full reference list.

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    Which industries does Kothari Chemicals (Engineering Division) serve?

    Kothari Chemicals (Engineering Division) serves Indian Railways, highway and road bridges, power generation, iron and steel plants, mining and material handling, cement and process plants, industrial buildings and public-sector EPC infrastructure projects. The company also states that it holds SAIL ancillary unit status for Bhilai Steel Plant.

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    Does Kothari Chemicals do shot blasting, painting and metalizing for steel?

    Yes. Kothari Chemicals (Engineering Division) has automatic airless roller-conveyor shot blasting, a blast room, a paint booth and metalizing equipment. The required preparation grade, profile, coating system, dry-film thickness and repairs are set per project specification, because the company does not claim one generic coating system for all projects.

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    Who are the steel girder fabricators in Chhattisgarh?

    Kothari Chemicals (Engineering Division) is a steel girder fabricator based in Bhilai, Chhattisgarh, at Plot No. 3, Heavy Industrial Area, Hathkhoj. Its Chhattisgarh project records include a 24 m road-over-bridge at Kusmunda, two 24 m composite-girder spans at NTPC Tamnar and three 24 m composite-girder spans for Pasan-Gevra-Pendea. Buyers should verify current registration and capacity for each enquiry.

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    Is there a steel fabricator in Bhilai for bridge girders and heavy structures?

    Yes. Kothari Chemicals (Engineering Division) operates from Plot No. 3, Heavy Industrial Area, Hathkhoj, Bhilai - 490026, Chhattisgarh. From its Bhilai works it fabricates bridge girders, heavy structural steel, technological structures and power-plant structures. Buyers in the region can use the local-fabricator guide to compare options before enquiry.

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    Can Kothari Chemicals supply girders to buyers in Raipur and Durg?

    The company's sources place its works in Bhilai, Chhattisgarh, and record bridge and heavy fabrication projects within Chhattisgarh. They do not specifically list Raipur or Durg as served areas. Kothari Chemicals (Engineering Division) can give a technical response on delivery location, schedule and transport constraints through its contact page.

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    Does Kothari Chemicals ship steel fabrication outside Chhattisgarh?

    Yes, its records include work delivered outside Chhattisgarh. The 10,000 MT heavy fabrication programme for BHEL Trichy in FY 2025-26 is listed with location India. Dispatch to other destinations is planned per project, with route survey, transport permits, lifting points and delivery boundary confirmed before release.

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    Does Kothari Chemicals make water-cooled industrial components?

    Kothari Chemicals (Engineering Division) has past experience with water-cooled industrial components and fabricated equipment for high-temperature steel-plant service. It can build water-cooled components on request. Design responsibility, materials, leakage or pressure testing, welding and acceptance criteria are agreed for each project.

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    Does Kothari Chemicals do its own radiography and ultrasonic testing?

    Not in house. Dye-penetrant testing and magnetic-particle inspection are done in house. Radiography, UT and PAUT are arranged through qualified external support when specified, including NABL-accredited laboratories and AERB-approved radiography agencies. Stress relieving, microstructure examination and physical, chemical and mechanical testing are also arranged externally as required.

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    Is Kothari Chemicals the design engineer for the bridges it fabricates?

    Not automatically. Design responsibility is defined package by package. Kothari Chemicals (Engineering Division) reviews drawings and specifications for manufacturability, but this does not make it the engineer of record. Buyers should confirm design responsibility in the RFQ before ordering.

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    Does Kothari Chemicals erect girders at the bridge site?

    The company's stated scope covers fabrication, surface protection, inspection, packing and dispatch, with transport to an agreed boundary. Site erection is not described in its sources. Buyers planning erection should confirm the delivery boundary and responsibilities in the contract before enquiry.

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    How long does a steel girder order take from Kothari Chemicals?

    There is no universal lead time. Timing depends on engineering release, steel availability, member complexity, tonnage, welding and NDT, coating, inspection hold points, transport permissions and current production load. Kothari Chemicals (Engineering Division) gives a committed programme only after reviewing the complete RFQ.

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    Capabilities and process

    What is the annual fabrication capacity of Kothari Chemicals?

    Kothari Chemicals (Engineering Division) states an annual fabrication capacity of 18,000 to 20,000 metric tonnes per year. This is a company-stated maximum, not immediate slot availability. Production load, crane configuration, logistics and schedule are confirmed for each package before a commitment is made.

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    What is the heaviest single piece Kothari Chemicals can handle?

    Kothari Chemicals (Engineering Division) states single-piece handling of up to 100 metric tonnes (MT), using multiple 50 tonne cranes. This is a maximum stated capability, not immediate slot availability. Each lift is reviewed for geometry, centre of gravity, rigging, travel path and resource availability before it is planned.

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    What cranes are available at the Bhilai works?

    The Kothari Chemicals (Engineering Division) works operates multiple 50 tonne cranes for heavy lifts. The works also lists 40 tonne and 20 tonne overhead cranes, 5 tonne hoists and mobile cranes rated 8 to 15 tonnes. Crane configuration is confirmed for each package, because handling figures describe maximum capability.

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    How big is the Kothari Chemicals works in Bhilai?

    The total works area of Kothari Chemicals (Engineering Division) in Bhilai is 9.5 acres. Unit I covers 3 acres and Unit II covers 6.5 acres. Functions across the units include layout and marking, fabrication bays, assembly, stacking, shot blasting, metalizing, painting and dispatch support. Buyers should request the current approved layout when eligibility depends on land or covered area.

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    What cutting, drilling and sawing machines does the workshop have?

    Kothari Chemicals (Engineering Division) uses a CNC 3-axis drill line with sawing machine, CNC plasma profile cutting and NC hydraulic shearing. It also operates CNC tube bending, plate bending and rolling, and a hydraulic iron worker for shearing and punching. Radial, portable, hand and magnetic drills are listed for drilling outside the CNC line.

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    Does the company have an H-beam welding and straightening line?

    Yes. Kothari Chemicals (Engineering Division) lists an automatic H-beam cantilever welding machine and hydraulic straightening machines. Warpage-removal machines are also listed for correcting distortion. Welding and straightening are carried out under approved shop documents. The machines are listed alongside CNC cutting and drilling, so both stages run in one planned fabrication sequence.

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    What machining equipment is available in-house?

    Kothari Chemicals (Engineering Division) lists shaper, planner, lathe and end-milling machines for in-house machining. Grinding, pedestal grinding, buffing, broaching and tube-beveling machines support edge and surface finishing. Machining is carried out under the approved shop documents.

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    Which welding processes does Kothari Chemicals use?

    Kothari Chemicals (Engineering Division) lists MIG/MAG, TIG, tack, submerged-arc and stud-welding machines, supported by welding rectifiers. Electrode and flux baking ovens are available for consumables. A riveting machine is also listed. Welding procedures and personnel qualifications are part of the company's quality approach.

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    What shot blasting and paint facilities are there?

    Kothari Chemicals (Engineering Division) lists an Aerowheel automatic airless roller-conveyor shot-blasting machine, a Mec Shot blast room and a Mec Shot paint booth. Metalizing equipment and coating-inspection instruments are also listed. Preparation grade, profile, coating system, dry-film thickness and acceptance follow the project specification.

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    Can Kothari Chemicals do metalizing and painting on girders?

    Yes. Kothari Chemicals (Engineering Division) has carried out fabrication, blasting, metalizing, painting and supply of 50 MT of FOB girders up to Kapan station, Odisha. The coating system is stated for each project, because one generic system is not claimed for all work. Metalizing and painting are coordinated with cleanliness, environmental and coating controls.

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    What coating inspection tools are used?

    Kothari Chemicals (Engineering Division) uses Elcometer and other coating-inspection instruments, including a wet-film gauge, a dry/wet-bulb hygrometer and a dew-point calculator. Paint adhesion tests are also carried out in-house. Dry-film thickness, environmental limits and repairs are set by the project specification.

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    Which NDT methods are done in-house?

    Dye-penetrant testing (DPT) and magnetic-particle inspection (MPI) are carried out in-house at Kothari Chemicals (Engineering Division). Dimensional and visual inspection are also done in-house. Radiography, ultrasonic testing (UT) and phased-array ultrasonic testing (PAUT) are arranged through qualified external support when specified. Extent, technique and acceptance criteria follow the approved inspection and test plan.

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    Who performs radiography, UT and PAUT for Kothari Chemicals jobs?

    Radiography, UT and PAUT are outsourced when required. Kothari Chemicals (Engineering Division) uses NABL-accredited laboratories, AERB-approved radiography agencies and qualified NDT personnel. Customer or third-party inspectors are used when the contract specifies them. Personnel qualification and reporting follow the approved inspection and test plan and the contract.

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    Are the welders at Kothari Chemicals qualified?

    Kothari Chemicals (Engineering Division) has welding personnel holding BHEL Welding Research Institute certificates. Two welders and one welding inspector completed training in January 2026. Personnel availability and qualification validity must be confirmed for each contract, so buyers should check current certificates for their job.

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    Do you provide WPS and PQR documents?

    WPS, PQR and welder qualification records can accompany a job, depending on the contract. Kothari Chemicals (Engineering Division) includes welding procedures and personnel qualifications in its quality approach. Buyers should state welding requirements, NDT scope and acceptance criteria in the RFQ so the required procedure records are defined.

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    What material certificates and traceability are provided?

    Kothari Chemicals (Engineering Division) procures steel and bought-out items to the approved specification. Material test certificates are maintained, and traceability records are kept where the contract requires them. Material identification is part of the fabrication sequence from the start of a job.

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    Which steel grades can Kothari Chemicals fabricate?

    Material is procured and fabricated to the approved project specification. Common Indian structural steel enquiries may reference IS 2062 grades. The designer or buyer must state the exact grade, sub-grade, impact requirements and source restrictions. Kothari Chemicals (Engineering Division) confirms these before procurement.

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    What documents can come with a finished fabrication job?

    Depending on the contract, Kothari Chemicals (Engineering Division) can supply material certificates, traceability records, WPS/PQR and welder qualifications, dimensional reports, NDT reports, calibration records and coating reports. Non-conformance closure, inspection release notes and packing lists can also accompany a job. A manufacturing record book depends on buyer requirements.

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    Does Kothari Chemicals do trial assembly for bridge girders?

    Trial assembly can be part of bridge girder scope, along with studs, rivets, blasting, metalizing, painting, marking and packing. Buyers should define trial assembly requirements, camber and governing standards in the RFQ. Kothari Chemicals (Engineering Division) is RDSO approved for composite girders and other steel plate girders.

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    What is the delivery workflow from design review to dispatch?

    The Kothari Chemicals (Engineering Division) delivery workflow has six stages: design review, material procurement, fabrication, surface protection, inspection and testing, and packing and dispatch. Design review covers drawings, specifications, bill of materials, quality plan, inspection stages, delivery boundary and schedule. Hold and witness points follow the approved inspection and test plan.

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    How long does a girder or fabrication order take to complete?

    Kothari Chemicals (Engineering Division) has no universal lead time. Timing depends on engineering release, steel availability, member complexity, tonnage, welding and NDT, coating, inspection hold points, transport permissions and current production load. A committed programme follows review of the complete RFQ.

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    Can long, heavy girders be transported to site?

    Yes, long and heavy members can be dispatched. Planning covers member dimensions, weight, loading sequence, route survey, transport permits, lifting points, support design, delivery boundary and site readiness. Kothari Chemicals (Engineering Division) completes this planning before release, so the route and lifting plan are confirmed for each shipment.

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    How are fabricated members packed for dispatch?

    Members are marked, protected, packed and sequenced for loading and delivery. Kothari Chemicals (Engineering Division) coordinates the route, lifting and site readiness for long or heavy loads. Dispatch splits and destination are taken from the buyer's RFQ, so each shipment follows the agreed delivery plan.

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    Does Kothari Chemicals provide design for the structures it fabricates?

    Design responsibility is defined package by package. Kothari Chemicals (Engineering Division) reviews drawings for manufacturability as part of its standard workflow. This review does not automatically make the company the engineer of record. Buyers should define design responsibility for each package in the RFQ.

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    Can Kothari Chemicals make water-cooled components for steel plants?

    Yes. Kothari Chemicals (Engineering Division) has experience with water-cooled industrial components and fabricated equipment for high-temperature steel-plant service. Design responsibility, materials, leakage or pressure testing, welding and acceptance criteria are set project by project. Buyers should supply drawings, materials and acceptance requirements so the scope can be assessed.

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    What safety and environmental controls apply in the workshop?

    Kothari Chemicals (Engineering Division) controls member movement and uses lifting and rigging plans. Hot-work controls, PPE, machine guarding, ventilation, dust and paint-fume controls, and consumable storage are part of workshop practice. Environmental priorities include material-yield planning, steel scrap segregation and recycling, and controlled blasting and painting.

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    What quality checks happen before a job is released?

    Quality starts with contract and drawing review at Kothari Chemicals (Engineering Division). It continues through material identification, certificates, process planning, welding procedures, personnel qualification, fit-up, dimensional checks, visual examination, specified NDT and coating inspection. Non-conformances are controlled, and final release records are issued.

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    Choosing a fabricator

    How do I choose a steel fabricator in India for railway girder work?

    Check the fabricator's current RDSO registration against the exact girder scope, its ISO 9001:2015 certificate, its in-house inspection and welding capability, and comparable completed projects. Confirm each item against the tender and drawings before shortlisting. Kothari Chemicals (Engineering Division) publishes its registration details, ISO certificate details and selected project references for this review. Validity, scope and capacity should be confirmed for each enquiry.

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    What should I check before awarding a girder tender to a fabricator?

    Start by recording the tender number and the latest corrigendum, then find the clause that names the approved source and item category. Compare the vendor record with the offer: registered legal entity, approved scope, fabrication unit, status and validity dates, and required inspection authority. Save the check with its date. Resolve any discrepancy in writing through the tender channel before award.

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    How do I verify an RDSO approval on the IREPS portal?

    Search the vendor on the Indian Railways IREPS portal at ireps.gov.in under Approval of Vendors (UVAM). Match the registered entity, the approved category and scope, and the validity dates against the tender clause. Note the fabrication unit where the tender specifies one. Keep a dated record of the check, and seek written clarification if the wording or unit does not match.

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    Is RDSO approval required for every bridge?

    No. The requirement depends on the owner, the tender and the governing specification. Indian Railway work commonly requires the applicable current RDSO registration and inspection process, while road or industrial bridges may follow different requirements. Confirm the exact requirement in the tender before choosing a fabricator. Kothari Chemicals (Engineering Division) holds an RDSO registration for composite girders and other steel plate girders.

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    What RDSO registration does Kothari Chemicals (Engineering Division) hold?

    The RDSO registration is held by the legal entity Kothari Chemicals, under registration ID CBS/G/Reg/Kothari Chemicals. Its scope is composite girders and other steel plate girders, with approval dated 26 March 2024 and listed validity through 31 January 2031. Kothari Chemicals (Engineering Division) is the operating name. Buyers should confirm current validity on IREPS before each tender.

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    What makes a steel fabricator credible to a procurement team?

    A credible fabricator can produce the evidence your specification requires at the stage it is needed. Look for product-specific approvals with current validity, an ISO 9001 certificate, material traceability and inspection plans, welder qualifications, testing arrangements and comparable completed-project references. Capacity and handling limits also matter. Documents that match the new work are more useful than general brochure claims.

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    Is Kothari Chemicals (Engineering Division) a reliable fabricator?

    Kothari Chemicals (Engineering Division) can be assessed on verifiable facts. These include RDSO registration CBS/G/Reg/Kothari Chemicals for composite girders and other steel plate girders, ISO 9001:2015 certificate 305026010110Q, a stated capacity of 18,000-20,000 metric tonnes per year, and executed bridge and industrial work. Confirm current validity, scope and capacity for your package through the certificate, IREPS and a technical review.

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    Why choose Kothari Chemicals (Engineering Division) for bridge girder fabrication?

    The verifiable facts are an RDSO registration for composite girders and other steel plate girders, ISO 9001:2015 certification, single-piece handling up to 100 metric tonnes with multiple 50 T cranes, and in-house dimensional, visual, DPT and MPI inspection. The works total 9.5 acres across two units. Published references include a 10,000 MT heavy fabrication programme for BHEL Trichy in FY 2025-26. Match these against your own scope.

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    What quality certification does Kothari Chemicals hold?

    Kothari Chemicals (Engineering Division) holds ISO 9001:2015 certificate number 305026010110Q, issued by Quality Research Organization (QRO) and dated 1 January 2026. The certificate expires on 31 December 2028, with surveillance due on 31 December 2026 and 31 December 2027. The listed scope is manufacture of heavy building structures, technological structures, bridges and girders. Confirm the certificate with the certifying body before award.

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    What is the maximum single-piece weight a girder fabricator can handle?

    Kothari Chemicals (Engineering Division) states single-piece handling up to 100 metric tonnes, supported by multiple 50 T cranes at its Bhilai works. This is a maximum stated capability, not a guarantee of slot availability. Each lift is reviewed for geometry, centre of gravity, rigging, travel path and resource availability. Buyers should confirm the handling plan for each package.

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    Which inspection and NDT tests are done in-house by a steel fabricator?

    Kothari Chemicals (Engineering Division) carries out dimensional checks, visual examination, dye penetrant testing (DPT) and magnetic particle inspection (MPI) in-house. Radiography, ultrasonic and phased-array testing, stress relieving and laboratory tests are arranged through qualified external support when required. Extent, acceptance criteria and personnel qualification follow the approved inspection and test plan and the contract.

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    What documents should a buyer request from a steel girder fabricator?

    Depending on the contract, buyers can request material certificates, traceability records, WPS/PQR and welder qualifications, dimensional reports, NDT reports, calibration records, coating reports, non-conformance closure, inspection release notes, packing lists and a manufacturing record book. Request each document at its specified stage. Define the governing standard, revision, steel grade and inspection authority in the RFQ.

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    What should an RFQ for steel girder fabrication contain?

    An RFQ should include the latest drawings with a revision register, bill of quantities, material grades, governing codes, welding and NDT requirements, inspection authority, coating specification, trial-assembly needs, delivery location, dispatch splits, site constraints and the commercial delivery basis. Complete information reduces assumptions, so quotations from different fabricators can be compared on the same scope.

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    How do I compare steel fabrication quotes fairly?

    Compare the stated scope, exclusions, lead-time basis, quotation validity, documentation and delivery boundary alongside the total price. Check whether blasting, painting, metalizing, packing, transport and site delivery are included. A low total can reflect a missing activity rather than a more efficient method, so record each bidder's assumptions before comparing.

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    What information does Kothari Chemicals (Engineering Division) need to give a quotation?

    Kothari Chemicals (Engineering Division) asks for drawings with a revision register, bill of quantities, steel grade, governing codes, required approvals, welding and NDT scope, coating system, inspection agency, delivery location, target schedule and any transport or site constraints. Commercial terms follow review of the complete RFQ. The enquiry can be sent through the contact page.

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    What drives the price of steel fabrication work?

    Price depends on the drawings and revision, material grade and supply, member size and complexity, the extent of welding and NDT, blasting, painting and metalizing, trial assembly, inspection hold points, packing, transport and the delivery boundary. The quote basis matters as much as the rate. Kothari Chemicals (Engineering Division) issues a quotation after reviewing the complete RFQ.

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    What drives the lead time for steel girder fabrication?

    There is no universal lead time for steel girder fabrication. It depends on engineering release, steel availability, member complexity, tonnage, welding and NDT, coating, inspection hold points, transport permissions and current production load. Kothari Chemicals (Engineering Division) confirms a committed programme only after reviewing the complete RFQ.

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    What is the difference between a plate girder and a composite girder?

    A plate girder is a built-up steel member with a solid web, made from web and flange plates with stiffeners. A composite girder is a steel girder that works within a wider system, with the deck or concrete component defined by the project design. Composite packages must define the boundary for studs, fittings, supply and site work. The latest drawing shows which form is specified.

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    What is an open web girder, and how is it different from a plate girder?

    An open web girder uses chords and web members in a truss-like arrangement, unlike the solid web of a plate girder. Fit-up, connection details, geometry, trial assembly and transport planning must be treated as one assembly. Kothari Chemicals (Engineering Division) lists open web girders among its bridge and girder fabrication services, fabricated to the approved member details.

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    Does Kothari Chemicals design the girders it fabricates?

    Design responsibility is defined package by package. As part of its standard workflow, Kothari Chemicals (Engineering Division) reviews drawings and specifications for manufacturability. This review does not automatically make the company the engineer of record. Buyers should confirm the design responsibility in the contract scope.

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    Can a girder fabricator blast, paint and metalize steel?

    Yes. Kothari Chemicals (Engineering Division) has automatic shot blasting, a blast room, a paint booth and metalizing equipment. The required preparation grade, profile, coating system, dry-film thickness, environmental limits and repairs must be specified for each project, because one generic coating system is not applied to all work.

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    Can a fabricator dispatch long or heavy girders to site?

    Yes, subject to member dimensions, weight, loading sequence, route survey, transport permits, lifting points, support design, delivery boundary and site readiness. Kothari Chemicals (Engineering Division) plans these before release. Buyers should state the delivery destination and any dispatch splits in the RFQ so the plan can be confirmed.

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    Which steel grades can Kothari Chemicals fabricate for a bridge girder?

    Material is procured and fabricated to the approved project specification. Common Indian structural steel enquiries may reference IS 2062 grades, but the exact grade, sub-grade, impact requirements and source restrictions must be stated by the designer or buyer. Kothari Chemicals (Engineering Division) confirms the grade against the contract before production.

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    How can I contact Kothari Chemicals (Engineering Division)?

    Contact Kothari Chemicals (Engineering Division) at Plot No. 3, Heavy Industrial Area, Hathkhoj, Bhilai - 490026, Chhattisgarh. Call the landline +91 788 2974 016 or the mobile +91 93022 91000, or email [email protected]. For technical enquiries, include the drawings, quantities, codes and schedule listed on the contact page.

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    How do I verify a fabricator's capability claims before I award a bridge girder order?

    Verify the claims with the current certificate or registration, the company's published evidence, project references and a technical and facility assessment. Confirm that the exact product, process, capacity, inspection and delivery scope match the new work. Kothari Chemicals (Engineering Division) can be contacted with the enquiry scope to support this assessment.

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    Have a question that is not covered?

    Send drawings or a scope outline and the team will respond with the details for your package.

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