During the injection foaming process of directly buried polyurethane insulation pipe, the quality of polyurethane insulation pipe foam is directly affected by the raw material temperature and the ambient temperature. The ambient te... [阅读全文]

Epoxy resin coated composite steel pipe, also known as mining coated composite steel pipe, is a pipeline material specifically designed for use in coal mines. It is made of seamless steel pipes or welded steel pipes as the ba... [阅读全文]

The requirements for burrs and excess height of welded steel pipe welds are as follows: After removing the burrs inside the straight seam welded steel pipe weld, the remaining height should not exceed 1.5mm; When the wall thic... [阅读全文]

Comparison table of specifications and models of polyurethane foam prefabricated insulation pipe: DN32: A series (outer diameter of steel pipe 42mm), B series (outer diameter of steel pipe 38mm); DN40: A series (steel pipe outer... [阅读全文]

The pressure of epoxy resin coated composite steel pipes used for water supply is generally divided into five levels: 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5Mpa, and 5.0Mpa. The connection methods are divided into double flange sealing conne... [阅读全文]

The base pipes of large-diameter water supply coated plastic steel pipes mainly include spiral seam welded steel pipes, straight seam submerged arc welded steel pipes, and straight seam high-frequency welded steel pipes. When the... [阅读全文]

Polyurethane insulation pipe is composed of high-density polyethylene outer sheath, polyurethane rigid foam layer and seamless steel pipe or spiral steel pipe. Also known as&quo; Pipe in pipe;, There are one-step and two-step prod... [阅读全文]

The spiral seam submerged arc welding method for steel pipes can ensure the quality and stability of the welded joints, thereby ensuring the safe operation of the pipeline system. Secondly, the process parameters of the spiral ... [阅读全文]

Design instructions for steel sleeve steel directly buried pipes in a certain steam and condensate pipeline project: 1. After the welding of steel sleeve steel steam directly buried insulation pipes is completed, 100% X-ray inspe... [阅读全文]

The base material of the coated composite steel pipe used in coal mines is 20 # steel seamless steel pipe, which is coated with epoxy resin for corrosion prevention. The thickness of the inner and outer coatings shall not be... [阅读全文]