... arc welding line); widely use as transmission line for oil, gas, nature gas, water and other high ... industry, city gas and water supply line.1. Certification: API Spec 5L, CE PED, ISO 9001, ISO14001, OHSAS ... 18001.2. Material grade: API 5L Gr.B-X80.3. Standard: API Spec 5L, GB9711.1-97(Chinese ... .minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Jianlong API Pipe