The stainless steel lined bimetal composite pipe produced by our company adopts hydraulic internal expansion forming technology, which has reliable molding, and the inner and outer pipes are tightly integrated with the whole body (plastic deformation of the inner pipe and elastic deformation of the outer pipe are adopted. When the pressure is released, the outer pipe returns to its original state In order to achieve a close combination of the outer tube and the inner tube, the bonding force is up to 5Mpa), the surface of the inner tube is smooth, there are no spinning forming marks, the comprehensive stress conditions are good, and the production efficiency is of high quality and stability. The technology has won the national utility model patent At the same time, our company can provide technical services such as composite pipe material selection, construction guidance and training, break processing and pipe end welding guidance according to the user's requirements.

Process supporting

1. Outer diameter range of bimetal composite pipe: φ114 ~ φ660mm, length & 6-12m;

2. The thickness of the outer base pipe and the thickness of the inner lining pipe can be freely selected and matched according to the customer's requirements.

3. Different combinations of the above-mentioned outer base pipe and lined pipe can be realized according to the corrosive environment and working requirements.

The execution standards of stainless steel composite pipes are as follows:

I. The lining stainless steel composite steel pipe used for urban construction needs to implement the urban construction industry standard CJ / T192-2004, in which the lining pipe and the outer pipe meet the following standards

GB / T 3091-2001 Welded steel pipe for low-pressure fluid transportation

GB / T 12771-2000. Stainless steel welded steel pipe for fluid transportation

GB / T 8163-1999 seamless steel pipe for liquid transportation

GB / T 17219-1998 Code for hygienic safety evaluation of drinking water transmission and distribution equipment and protective materials

CJ / T 151-2001 thin wall stainless steel pipe

The grade and chemical composition of steel used for lining stainless steel pipes shall comply with the grades and chemical composition of 0cr19Ni9 (304), 0cr18Ni11Ti (316), 0crl7Ni12Mo2 (3161) austenitic stainless steel specified in GB12771-2000 and CJ / T151-2001.

The surface of the outer steel pipe can be galvanized according to user requirements, covered with plastic, fire-resistant coating or anti-corrosion coating.

At present, the specifications and dimensions of the composite steel pipes for urban construction produced by the company are as follows:

Specifications, dimensions and errors of composite steel pipes for urban construction (CJ / T192-2004)

2. The provision of anti-corrosion steel pipes (stainless steel composite pipes) suitable for the transportation of gas, water and oil in the petroleum and natural gas industries shall comply with the following standards:

GB / T9711.1-3—2005 Technical conditions for delivery of steel pipes for the oil and gas industry

API SPEC 5L — 2005 Pipeline Specification

API SPEC 5LC — 2006 CRA Pipeline Specification

API SPEC 5LD —1998 Specification for Corrosion Resistant Alloy Composite Steel Pipe or Liner

Note: In order to meet the requirements of on-site construction and welding performance, the material of the outer pipe can be 20G high-quality low-carbon steel as required. 20G has high strength and good plastic toughness, and has good weldability.

Specifications and parameters of anti-corrosion steel pipes (stainless steel composite pipes) for gas, water and oil transportation in the petroleum and natural gas industries: