BIS ISI Certification for Stainless Steel Seamless Pipes and Tubes for General Service in India falls under mandatory BIS ISI Mark certification in India under the applicable Quality Control Order (QCO). Unlike the BIS CRS scheme, the ISI Mark (FMCS licence) requires a factory audit by a BIS officer, in-plant quality management verification, and ongoing product testing through periodic surveillance — in addition to type-testing at a BIS-approved laboratory. Non-compliance attracts market withdrawal, seizure of goods, and prosecution under the BIS Act 2016.
This guide covers the applicable Indian Standards, mandatory testing requirements, the step-by-step FMCS licence process, documentary requirements, and the most critical compliance pitfalls for this product category in 2026.
📜 Applicable Indian Standards
The following Indian Standards and Quality Control Orders apply to this product category:
- IS 6913 : 2023 — Stainless steel tubes for general service (seamless) — Specification
- IS 1570 (Part 5) — Schedules for wrought steels: stainless and heat resisting steels
- IS 6103 — Method for specifying metric screw threads — general purpose
- Applicable QCO — Stainless Steel Pipes, Tubes and Fittings (Quality Control) Order, as notified by the Ministry of Steel
📌 Stainless steel seamless pipes and tubes for general service fall under mandatory BIS ISI certification — not CRS. The ISI mark (FMCS licence) requires factory-level audit by a BIS officer, in-plant quality management verification, and ongoing product testing at a BIS-approved laboratory. A CRS R-number alone does not satisfy the legal requirement for this product category.
🔬 Mandatory Tests and Assessments
BIS-approved laboratories and BIS officers evaluate the following key areas during type-testing and factory audit for this product category:
Chemical Composition
Verification of chromium, nickel, molybdenum, carbon, and other alloying element content against IS 6913 grade specifications.
Mechanical Properties
Tensile strength, yield strength, elongation, and hardness testing of samples from each production batch.
Dimensional Accuracy
Outer diameter, wall thickness, ovality, and straightness verification against IS 6913 dimensional tolerances.
Hydrostatic and Non-Destructive Testing
Hydrostatic pressure test or eddy-current non-destructive test on every pipe/tube as specified in IS 6913.
📋 Step-by-Step BIS ISI Mark (FMCS) Licence Process
- IS Standard and QCO Applicability ConfirmationConfirm the product falls under the notified QCO for stainless steel pipes and tubes and identify the applicable grade(s) under IS 6913.
- BIS Licence Application (Form V)Submit Form V application online on BIS Manak Online portal with all factory and product details, requesting FMCS licence under IS 6913.
- Factory Audit by BIS OfficerA BIS officer visits the manufacturing plant to audit in-plant quality controls, testing equipment, process records, and raw material traceability.
- Product Testing at BIS LabSamples drawn by the BIS officer during audit are tested at a BIS-approved laboratory for all IS 6913 requirements including chemical composition and mechanical properties.
- BIS Query and Compliance ResponseAny non-conformances observed during audit or testing must be addressed with documented corrective actions before licence grant.
- FMCS Licence Grant and ISI MarkBIS grants the FMCS licence upon satisfactory audit and test results. The ISI mark (IS 6913 certification mark) is then stamped or embossed on each pipe/tube.
- Surveillance and RenewalBIS conducts periodic surveillance audits (typically twice yearly) and product sample testing. The licence is renewed annually subject to continued compliance.
📄 Documents Required
- Completed BIS Form V licence application
- Factory registration certificate and proof of address
- List of production equipment, testing equipment, and calibration certificates
- Raw material test certificates (mill certificates) for stainless steel billets or tubes
- In-plant quality control plan and standard operating procedures
- Sample test reports from BIS-approved laboratory for all IS 6913 requirements
- Trademark registration certificate (if applicable)
- Authorised signatory identity and authority documents
- Layout plan of factory and laboratory
⚠ Common Causes of Licence Rejection or Suspension
Common causes of licence rejection or suspension include chemical composition of production batches failing to meet the IS 6913 grade specification, mechanical properties (particularly elongation) falling below minimum requirements, in-plant hydrostatic or eddy-current testing not covering 100% of production as required, calibration records for testing equipment being incomplete or out of date, and raw material traceability records failing to link finished pipes to specific heats of steel.
🏭 Special Considerations for Importers
Importers of stainless steel seamless pipes must ensure that every imported lot bears the ISI mark under IS 6913 before customs clearance. Under the applicable QCO, import of non-marked products is prohibited. BIS and the Directorate General of Foreign Trade (DGFT) coordinate to enforce the QCO at ports of entry. Importers should obtain mill test certificates and ISI mark documentation from the overseas manufacturer before shipment.
Stainless Steel Seamless Pipe BIS ISI Certification Partner
Global Approbation manages BIS FMCS licence applications for stainless steel seamless pipes and tubes — from IS 6913 testing to ISI mark grant and ongoing surveillance support.
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