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Quality requirements for seamless steel pipes

Quality requirements for seamless steel pipes

Keywords :Quality requirements for seamless steel pipes        Update : 2023-06-20        View(s) : 612

The surface quality of steel pipe: requirements for smooth surface a. Dangerous defects: cracks, inward folds, outward folds, crushing, delamination, scarring, concaves, convex hulls, etc. b. General defects: pockmarks, green lines, scratches, bruises, slight inner and outer straights, roller ma...

Causes of cracks in Q345B seamless steel pipe

Causes of cracks in Q345B seamless steel pipe

Keywords :Causes of cracks in Q345B seamless steel pipe        Update : 2023-06-19        View(s) : 484

Special pipes for oil and natural gas drilling and transportation are collectively referred to as petroleum geological pipes. Among them, the geological pipe is specially used for geological exploration and is the main tool for exploring underground resources. Geological pipe includes geological dri...

Stainless steel pipe welding precautions

Stainless steel pipe welding precautions

Keywords :Stainless steel pipe welding precautions        Update : 2023-06-16        View(s) : 472

1. The power supply with vertical external characteristics is adopted, and the positive polarity is used for DC (the welding wire is connected to the negative pole). 2. It is generally suitable for welding thin plates below 6mm. It has the characteristics of a beautiful weld shape and small wel...

The development trend of anti-corrosion steel pipe

The development trend of anti-corrosion steel pipe

Keywords :The development trend of anti-corrosion steel pipe        Update : 2023-06-15        View(s) : 529

The type of anti-corrosion steel pipe should be selected according to the working pressure, use, its environment and the material to be transported. Ordinary-grade TPEP anti-corrosion steel pipes are classified according to thickness, thin steel plates are 4 mm (thinnest 0.2 mm), medium-thick st...

Non-destructive testing of steel pipe fittings and steel flanges

Non-destructive testing of steel pipe fittings and steel flanges

Keywords :Non-destructive testing of steel pipe fittings and steel flanges        Update : 2023-06-14        View(s) : 504

1. Tees, crosses, press-formed reducers, and pipe caps formed by the direct cutting of bars of all material categories shall be non-destructively tested one by one; among them, carbon steel, alloy steel, and low-temperature steel shall be tested according to NB/T47013.4 or related specifications for...

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