... 3. ISO 9001 Certificate 4. BV certificate Product Description1.Carbon steel 90 degree seamless elbow WPB A2342.Size :1/2" -48"3. ... .9,ASME , ASTM,,JIS , DIN , EN,MaterialCarbon steelConnectionSeamless and Butt-welding Applications rangsuch as oil, chemical industry, water conservancy ... company is the manufacture of the carbon steel pipe fittings WPB A234,Elbow,Tee,Reducer and Capwe had do this business ...