2022-08-03 BSP pipe fittings is one of the most popular and commonly used threaded fittings in the industries, there are two types that parallel (BSPP) and tapered (BSPT). They are available in dimensions that below 4 inch and provide reasonable solution for joining pipeline and equipment. Shanghai Zhcuheng supply tees, couplings, unions, bushing, cross, hex nipples, unions, elbows, caps and swage for many projects.