... 1/2"--48" (DN15--DN1200) 3, Certification:SGS Specialized in producing elbow Features: 1) Type: butt welded and seamless2) ... 321H, 310S, 347H,S31803,904L,)6) Applications range: For use in the petroleum, smelting, foodstuff, power, papermaking, chemical, medical ... cases or as per customers' requests. Tianjin Haozeshun steel trade Co.,Ltd. is an international steel enterprise, and takes "expanding ...