3PE anti-corrosion steel pipe is a kind of anti-corrosion pipe commonly used in China, which refers to the three-layer structure polyethylene coating (MAPEC) anti-corrosion steel pipe, the first layer of epoxy powder (FBE > 100um), the second layer of adhesive (copolymer) 170 ~ 250um, the third layer of polyethylene (PE) 2.5 ~ 3.7mm, these three materials are closely combined together. And firmly combined with steel pipe to form an excellent anticorrosive layer, thus greatly improving their performance, so that it has good corrosion resistance, water and gas permeability resistance, and mechanical properties, etc., has been widely used in the oil pipeline industry. So, how to use 3PE anti-corrosion steel pipe? What are the connection methods of 3PE anti-corrosion steel pipe?

Commonly used 3PE anticorrosive steel pipe connection methods are welding, flange connection, and groove connection these several,

The former welding with welding method of 3 PE anticorrosive pipe, has a simple structure, can immediately connect prefabricated, material economy, convenient manufacturing processing, automation technology can be practical, butt joint sealing good, bending stiffness big advantage, so, in the case of customers are not required to remove the pipe, The method of electric welding can be used to connect 3PE anti-corrosion steel pipe;

(2) Flange connection, as the name implies, is the method of flange connection, used in 3PE anti-corrosion steel pipe here refers to the flange welding to the branch pipe, the middle of the two branch pipe welding flange, or directly connected to the flange, and then with 2 welding flange connection, the middle of the gasket;

(3) The latter groove connection, is now used in the liquid, gas pipeline connection method, with the need to use rigid joints, flexible joints, mechanical tee, and groove type flange elbow, tee, four, reducing pipe, blind plate, etc.

Special attention should be paid here :

(1) before 3PE anti-corrosion steel pipe welding, it is necessary to remove the outer anti-corrosion layer of 50-100mm at the end of the pipe mouth and remove the dirt such as oil and water, and rust on both sides of the groove, so that the metal luster is exposed, and then according to the standard requirements, preheating, welding, heat preservation, detection, etc.; 

(2) In the process of the 3PE anti-corrosion steel pipe flange connection, the iron flange should be welded at one end of the 3PE anti-corrosion steel pipe. After welding, the surface of the iron flange is sprayed with epoxy resin repair paint, and the two iron flanges welded on the steel pipe are connected and fastened together with bolts; 

(3) In the process of flange connection of 3PE anti-corrosion steel pipe, the thermal contraction belt should be completely wrapped around the two PE flanges, and the middle should not be exposed. The thermal contraction belt should be heated so that the radial contraction of the belt can completely cover and stick to the PE flange.

All right, the above is about the connection method of 3PE anti-corrosion steel pipe introduction, in general, there are three kinds, but in fact, no matter which connection method is used to connect 3PE anti-corrosion steel pipe, it is necessary to clean the pipe first, the correct connection, in order to achieve its due role.

Cangzhou shenlong pipe manufacturing co., ltd. Is engaged in oil, gas, water, coal slurry mixing medium steel pipeline coating operations, anti-corrosion, insulation, piping is set in a body's specialized pipeline engineering precast construction enterprises, products used in an oil pipeline, chemical piping, electrical, pipe, gas pipe, heat pipes, sewage pipes, etc. Anti-corrosion processing of straight pipe and bend pipe DN40-3000 three-layer structure polyolefin (PE, PP, TPEP,3LPE) steel pipe coated with anti-corrosion, DN40-3800 steel hot stewed bend pipe and pipe fittings coated with FBE, epoxy resin coating anti-corrosion, DN40-3800 steel pipe inner wall resistance reduction, solvent-free epoxy steel pipe, epoxy paint anti-corrosion, Coated plastic steel pipe, dip plastic steel pipe. Lined with plastic steel pipe PE, PO, PP, PTFE, HDPE, polymer polyethylene corrosion. The company is in strict accordance with China Petroleum and Natural Gas SY/T0413-2002, national GB/T23257-2009, German DIN 30670, American AWWA C210, and other international and domestic anti-corrosion standards.