... 1/2"--48" (DN15--DN1200) 3, Certification:SGS Specialized in producing elbow Features: 1) Type: butt welded and seamless2) ... also produce other specifications according to customers' requirements . 3) Wall thickness: SCH5S-SCH160S. 4) Standard: ASME/ANSI B16.9, ... 321H, 310S, 347H,S31803,904L,)6) Applications range: For use in the petroleum, smelting, foodstuff, power, papermaking, chemical, medical ...