Are you working in the US or globally on a project that requires flanges compliant with the American Society for Testing and Materials (ASTM) or American Society of Mechanical Engineers (ASME). No worries – Alleima offers a wide range of ASTM/ASME flanges in various types of stainless steel.
Our portfolio of ASTM/ASME flanges covers the following materials:
- Austenitic stainless steels: ASTM 304/304L and ASTM 316/316L
- Duplex stainless steel: SAF™ 2205 / UNS S31803 / EN 1.4462
- Super-duplex stainless steel: SAF™ 2507 / UNS S32750 / EN 1.4410
The Alleima portfolio also includes a wide range of flanges according to EN as well as an extensive range of fittings.

- Austenitic stainless steels: ASTM 304/304L and ASTM 316/316L
- Duplex stainless steel: SAF™ 2205 / UNS S31803 / EN 1.4462
- Super-duplex stainless steel: SAF™ 2507 / UNS S32750 / EN 1.4410
The Alleima portfolio also includes a wide range of flanges according to EN as well as an extensive range of fittings.
Types of ASME flanges
Welding neck flanges
Slip-on flanges
Blind flanges
Socket welding flanges
Lap joint flanges
Standard specification for ASTM/ASME flanges from stock
Flanges, forged from ASTM A182, F304/304L or F316/316L (dual marked and certified), conforming to ASME B16.5. These flanges are annealed, fully machined, and feature a raised face with a smooth finish (125-250 RMS / 3.2-6.3µM) in accordance with MSS-SP6. Hardness is certified in accordance with NACE MR0175 (latest edition). Intergranular corrosion (IC) is tested to ASTM A262 E and all flanges undergo PMI testing.
Our ASTM/ASME flanges are certified according to EN 10204/3.1.