... DIN, UNI, JIS, GB 3.Various type:Slip-On, Welding Neck,etc 1. Size: 1/2" - 40 (DN15 mm-1000 mm). 2 ... :2000,QS-9000 and Pressure Vessels accessories and access to quality inspection InspectionsFactory in-house or Third Party inpection ... . ApplicationPetroleum, chemical, power, gas, metallurgy, shipbuilding,construction, etcTypeSlip-On, Welding Neck, Blind, Socket Welding, Threaded and Joint etc. ...