As an efficient and dedicated transportation method, pipeline transportation has played an increasingly important role in oil and gas transportation and other fields. Domestic large-diameter transportation pipelines are currently mainly constructed of spiral welded steel pipes. To ensure the reliabl

Maintenance method of large diameter straight seam steel pipe1. Choose suitable venues and warehouses(1) The site or warehouse for storing steel pipes should be located in a clean place with unobstructed drainage, far away from factories and mines that produce harmful gases or dust. Weeds and debris

Construction before welding of large-diameter steel pipes and anti-corrosion treatment of the inner wall of the pipeConstruction preparation before welding of large diameter steel pipe:1. Organize relevant operators, be familiar with construction drawings and specifications, formulate welding proced

How to improve the wall thickness accuracy of reinforced 3pe anticorrosive steel pipe?1. For the heating of the tube billet, it is necessary to pay attention to uniform heating, prohibit rapid temperature rise and fall, and keep the temperature rise and fall smoothly.2. Use the centering roller to d

How to judge the quality of spiral welded steel pipe1. From the surface of the spiral steel pipe, see whether the production process of the spiral steel pipe is superb. Generally, it is necessary to study and analyze spiral steel, and the cross-section of counterfeit spiral steel pipe is elliptical.

The cause and adjustment of uneven steel pipe wall thickness1. Uneven spiral wall thickness is caused by: the uneven wall thickness caused by the adjustment of the piercing machine's rolling centerline, the inclination of the two rolls, or the reduction of the front head is too small, generally alon

Inspection method of high frequency welded pipe1. Chemical composition analysis: chemical analysis method, instrumental analysis method (infrared C—S instrument, direct reading spectrometer, zcP, etc.).A. Infrared C-S instrument: Analyze the C and S elements in ferroalloys, steel-making raw material

Development status and prospects of domestic and foreign oil and gas pipelinesAn important driving factor for the development of oil and gas pipelines is the imbalance in the production and demand of oil and gas resources in various regions. Since the development of the oil and gas industry, most co

As oil and natural gas resources are often located in remote areas and harsh environments, greater pressure pipelines transporting, complex and corrosive media, and pipeline welding assembly ring general in the wild, which not only requires pipeline steel with high strength, and requirements should

Also known as spiral or helix spiral steel pipe, is a low-carbon steel or low-alloy structural steel strip at a certain helix angle (called molding angle) rolled into a tube, and the tube is made of welded joints It can be produced with a narrow strip of large diameter pipe. Classes of spiral steel