1.standard: China:GB12459-90 HGJ514-87  SHJ408-90
2.Germany:DIN2605  DIN2606  DIN2615 Japan:JIS B2311  JIS B2312 JIS B2313
3.U.S.A :ASME/ANSI B16.9  ASME/ANSI B16.28   ASME/ANSI B16.11
4.MATERIALS :304 304L 316 316L 321 2520
5.Size: 15-1000mm
6.PRESSure Ratings: 5s-160s