... certification:ISO9001 4)type: wn, so, pl, bl, thread C22.8 carbon steel welding neck flange1.specificationStandards: ANSI(ASME), AWWA, DIN ... 4435,1.4541,1.4571)A105/C21/1.0432 C22.8/P150GH/1.0460 9 BS4504 SEC.3.1/1989 ... 1503-304S11304S31 321S31 316S31 316S11 10 BS10-1962 STANDARD NB10-3000 TABLE D/ E /F/H/J SO THD BL ... BL,PL,WN,LOOSE,THD RST37.2/1.0038/DIN17100C22.8/1.0460A105/C21/1.0432 1.430 1.4307 ...