Which standards does Kalp Alloys manufacture to?
Kalp Alloys manufactures to ASME B16.5 and B16.47 for flanges, ASME B16.9 and B16.11 for fittings, EN 1092-1, DIN and BS 4504 for metric flanges, ASTM A105, A182, A234, A312 and A350 for materials, and NACE MR0175 / ISO 15156 for sour service.
Key Takeaways
- A complete purchase order names two standards: a dimensional one and a material one.
- ASME B16.5 covers NPS 1/2 inch to 24 inch; ASME B16.47 Series A and B cover 26 inch to 60 inch.
- EN 1092-1, DIN and BS 4504 are the metric PN-rated families and are not interchangeable with ASME classes.
- ASTM A105, A182, A234 and A312 are material specifications, always paired with a dimensional standard.
- NACE MR0175 governs sour service and is a hardness requirement on the finished part, not just on the billet.
- Every standard listed here is manufactured at our own plant with EN 10204 3.1 or 3.2 certification.
Dimensional standards
What the flange must measure
These fix outside diameter, thickness, bolt circle, bolt count and facing, so flanges from different makers bolt together.
Material specifications
What the metal must be
These fix chemistry, mechanical properties, heat treatment and testing. They carry no dimensions, which is why both standards appear on a correct order.
Service-specific requirements
Constraints imposed by the service itself
Sour service and certification requirements sit on top of the dimensional and material standards rather than replacing them.
How to write a complete line item
An unambiguous line item names six things: the item type, the size, the rating or schedule, the facing where applicable, the material specification and grade, and the dimensional standard. For example: weld neck flange, 6 inch, Class 300, RF, ASTM A182 F316L, ASME B16.5, bored to SCH 40.
An order reading “6 inch stainless flange” can be filled a dozen different ways, and the difference between them is measured in weeks of rework. Where a specification is unclear, send it with the enquiry and we will confirm the interpretation in writing before manufacture.
All standard reference pages
Frequently Asked Questions
A dimensional standard such as ASME B16.5 fixes the geometry so parts fit together. A material specification such as ASTM A105 fixes the chemistry, mechanical properties and heat treatment. Both appear on a complete purchase order.
No. PN16 is not Class 150 and PN40 is not Class 300. The bolt circles and bolt counts differ, so the flanges do not bolt together even where the pressure ratings look similar.
Yes. All of the standards listed here are manufactured at our own facility in Rakhial, Ahmedabad, with EN 10204 3.1 or 3.2 certification issued in the Kalp Alloys name.