IS 6392 : 2020
Steel Pipe Flanges
summary
Steel pipe flanges are circular or oval metal components used to connect pipes, valves, pumps, and other equipment in piping systems. They provide easy assembly and disassembly, ensuring leak-proof joints. Steel flanges are widely used in oil and gas, power plants, water supply, chemical, and industrial piping applications.
Why BIS Certificate is Mandatory for Steel Pipe Flanges
BIS certification is mandatory to ensure steel pipe flanges meet Indian Standards for strength, dimensions, material composition, and pressure performance. Since flanges are critical for pipeline safety, BIS helps prevent leakage, pressure failure, and accidents, ensuring reliable operation, public safety, and regulatory compliance in India.
What is BIS Certified for Steel Pipe Flanges
The BIS certified specification for steel pipe flanges defines requirements for material grades, chemical composition, mechanical properties, pressure ratings, dimensions, tolerances, workmanship, and testing. It also includes inspection and marking requirements to ensure flanges are safe, durable, and compatible with standardized piping systems.
Test required for Steel Pipe Flanges
| Title | Mandatory/Optional |
|---|---|
| Material | Optional |
| Dimensions | Required |
| Machining of flanges | Required |
| Finish of joint surfaces | Required |
| Joint faces | Required |
| Flat Faces | Required |
| Attachment of Flange – Screwed Flanges | Required |
| Welding neck Flange | Required |
| Plate Flanges, slip on Boss flange and loose flange for welding | Required |
| Hydraulic testing of flanges | Required |
| Galvanizing | Required |
| Workmanship & Finish | Required |
Benefits of BIS Certification for Steel Pipe Flanges
1. Assured Product Quality
BIS certification ensures flanges are manufactured using approved steel grades with consistent strength and performance.
2. Safety and Reliability
Certified flanges reduce risks of leakage, joint failure, and pressure-related accidents in piping systems.
3. Dimensional Accuracy and Compatibility
BIS standards ensure uniform dimensions, allowing easy interchangeability with pipes and fittings.
4. Legal Market Access
BIS certification is mandatory in India, enabling manufacturers and importers to sell without legal or regulatory issues.
5. Trust and Industry Acceptance
BIS-marked flanges gain higher acceptance among EPC contractors, industries, and government projects.