Standard: China:GB12459-90 HGJ514-87 SHJ408-90 Germany:DIN2605 DIN2606 DIN2615 Japan:JIS B2311 JIS B2312 JIS B2313 U.S.A :ASME/ANSI B16.9 ASME/ANSI B16.28 ASME/ANSI B16.11 Materials :304 304L 316 316L 321 2520Size: 15-1000mmPressure Ratings: 5s-160s