ASTM A790 Seamless Steel Pipe
Specifications. ASTM A 790 ASME SA 790. Standard. AISI, DIN, EN, GB, JIS, ASTM, ASME UNS S31803 Pipe. UNS S31803 Seamless Pipe Outer Diameter. 6.00 mm OD up to 250 mm OD, Sizes up to 12" NB. UNS S31803 Welded Pipe size. 5.0 mm - 1219.2 mm. UNS S31803 EFW Pipe size.