Groove Tube knowledge: according to different steel by adding alloying elements varieties, we can simply be divided into three categories of steel: Stainless steel alloy is clear that changes when steel is sure to affect the performance of steel. changes, and for the fixed component is a certain kind of steel, such as 20 # steel, or 304L, when they are thermo mechanical processing, heat treatment, and its performance will vary. Based on whether the surface of the pipe with weld pipe fittings can be divided into seamless pipe fittings and pipe joints into two categories, GB12459-90 is seamless pipe fittings standard, GB / T13401-92 standard pipe joints is .HG514-87 Ministry of Chemical Industry standard fittings.

Packaging and printing knowledge fittings: Generally speaking, the pipe trench is generally used to pack cartons, wrapped inside the non-woven fabrics. Outside carton corresponding pipe type and quantity.