... 150 to 900 lbs are in accordance with MSS SP 44 standard.Flanges with long welding neck are from classes ... and from 300 to 2500 lbs are in accordance with ANSI B 16.36.Blind, slip on, welding ... Flanges from 2kg to 210 kg are in accordance with JIS.Flanges according to API 605/ASME B16. ... can be manufactured in different shapes and sizes 1. Standard:(forged flange)ANSI,JIS,DIN,BS4504,SABS1123,EN1092-1, ...