... carbon steel,alloy steel We are CANGZHOU GUYUAN STEEL PIPE CO.,LTD, a popular pipe fitting and flange manufacturers in China, can ... Pipe Fittings (Elbow, Reducing and Equal Tee,Eccentric and ConcentricReducer,Caps,Bend,Cross,return),produce strict as per GB12459,GOST17375/17376 ... / DIN / JIS / BS / GB and so on cn209679824 steel pipe caps GOST17379