1. Construction preparation(1) Operating conditions: The floor of the pipeline trench is completed; the brickwork of the pipeline well is completed.(2) Material requirements: Complete pipelines of various specifications and models.(3) Main machines and tools: cutting machine, polishing machine, elec

First, different categories1. Straight seam steel pipes: divided into metric electric welded steel pipes, electric welded thin-walled pipes, and transformer cooling oil pipes2. Seamless steel pipe: Seamless pipes are divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes,

1. How does edge gnawing of straight seam steel pipes occur? What impact does it have on welded pipes?The edge of the straight seam steel pipe usually occurs on the slitting strip roll. The edge of the straight seam steel pipe is a jagged and uneven phenomenon at the edge of the steel strip. The rea

During the production process of stainless steel welded steel pipes, intermediate heat treatment, and finished product heat treatment can be carried out. Because a bright surface without oxidation can be obtained, the traditional pickling process is eliminated. The use of this heat treatment process

Product execution standards: GB/T3091 welded steel pipe for low-pressure fluid transportation, GB/T13793 straight seam electric welded steel pipe.Yield strength ≥345mpa, tensile strength ≥470, elongation after fracture ≥18.Chemical composition: Carbon: ≤0.20, Silicon: ≤0.50, Manganese: ≤1.70, Phosph

With the development of the petroleum industry, steel pipeline transportation of oil and gas has developed rapidly due to its safety, economy, expertise, and efficiency. Long distance, large diameter, and high pressure are becoming the development direction of onshore oil and gas transmission steel

1. X-ray inspectionIt can pass through substances that cannot be penetrated by light, and check whether there are pores in the welding head, unstable welding, cracks, slag inclusions, shrinkage holes, etc.; it can detect the plane position and size of the defect and can detect the defects at the def

The biggest difference between straight-seam high-frequency resistance welded pipes (Electric Resistance Welding, referred to as ERW) and seamless steel pipes is that ERW has a weld seam, which is also the key to the quality of ERW steel pipes. Modern ERW steel pipe production technology and equipme

Use a power supply with vertical external characteristics, and use positive polarity for DC (welding wire is connected to the negative pole)2. Generally suitable for welding thin plates below 6mm, with beautiful weld shape and small welding deformation characteristics.3. The protective gas is argon

304 is a versatile stainless steel that is widely used to make equipment and parts that require good comprehensive properties (corrosion resistance and formability).301 stainless steel shows an obvious work hardening phenomenon during deformation and is used on various occasions requiring higher str