Reducing pipe is one of the chemical pipe fittings, used for connecting two different pipe diameters. Again divide into concentric size head and eccentric size head.

The materials of reducing pipe include stainless steel reducing pipe, alloy steel, carbon steel size head of reducing pipe, 20 steel q234Q345 of reducing pipe, etc.

GB/T13401-2005 reducing pipe standard stipulated in GB/T13401-2005 GB/T13401-2005 GB/T13401-2005 GB/T13401-2005 GB/T13401-2005 GB/T13401-2005 GB/T13401-2005 GB/T13401-2005

The quality of reducing pipe shall conform to the current national standard "Steel butt Welding Seamless Pipe Fittings" GB/T 12459-2005

Power Department standard GD0506~0507

National Standard (GB/T9112-2000)

Ministry of Machinery Standard (JB81-59, JB/T74-94)

Standard of The Ministry of Chemistry (SH3406-96)

Standards of the Ministry of Chemical Industry (HG5010-58, HG20592-97)