Couplers generally refer to the middle connecting parts connecting two components, which are used to fix the steel pipe at both ends with an outer diameter of 48mm in construction projects. The couplers are divided into double couplers,  swivel couplers, sleeve couplers and so on.

Classification

From the process can be divided into casting coupler, stamping coupler, forging coupler and so on. Among them, the quality of casting is not as good as stamping, stamping is not as good as forging.

From the surface treatment is divided into hot-dip galvanized coupler, electrical galvanized coupler, spray painting coupler, etc.

From the application can be divided into double coupler, swivel coupler, sleeve coupler, joint pin coupler, board retaining  coupler, putlog coupler, girder coupler, half coupler, pressed ladder coupler, limpet coupler and so on.

From the weight can be divided into light coupler and heavy coupler.

From the implementation standards can be divided into national standard coupler, British coupler, German coupler, American coupler, Australian coupler, Italian coupler, Japanese coupler, Korean coupler and so on, different implementation standards are applied in different national regions.

From the specifications can be divided into 48*48, 48*60, 60*60 and others, it is important that  specification refers to the outer diameter of the steel pipe.