... , paper-making, electrical power, aerospace, pharmaceutical, water treatment, chemical fiber, urban construction, machinery and equipments. We had already obtained ISO9001 ... SR Elbows, 180 Deg. LR Elbow,180 Deg. SR Elbow, 45 Deg. LR Elbow, 45 Deg. SR Elbow 2, Thickness: SCH20, SGP, ... STD, SCH40, XS, SCH80, SCH160, XXS 3, Dimension: 1/2" to 48" 4, Material: carbon steel ...