1. LSAW steel pipes should be submitted for acceptance in batches, and the batching rules should meet the requirements of the corresponding product standards.2. The inspection items, sampling quantity, sampling location, and test method of LSAW steel pipes shall be following the provisions of the co
Surface treatment method of anticorrosive spiral steel pipe1. The surface of the anticorrosive spiral tube is cleaned with solvents and emulsions. Remove the organic matter on the surface of the spiral tube, but it cannot remove the surface rust, oxide scale, welding flux, etc.2. Use a wire brush, s
The guaranteed method of the wall thickness accuracy of the straight seam steel pipe1. Tube billet heatingThe heating should be even, and the rapid rise and fall of the temperature should be avoided. The temperature of each rise and fall should be steady and slow, and the temperature of the rise and
Product: Seamless steel pipe. Standard: ASTM A106. Material: Carbon steel. Thanks for the confidence from the customer in Australia. Cooperating with threeway for more than 8 years. Australia pipe customers perfect receipt
Thick-walled steel pipes, the steel pipe whose outer diameter to wall thickness ratio is less than 20 is called thick-walled steel pipe. Mainly used as petroleum geological drilling pipes, cracking pipes for the petrochemical industry, boiler pipes, bearing pipes, and high-precision structural pipes
Annealing steps for straight seam steel pipesAnnealing of straight seam steel pipes is to heat the steel pipe to a temperature and keep it at this temperature and then slowly cool it to room temperature. Annealing includes annealing, spheroidizing annealing, and stress relief annealing.1. Heating th
How to purchase straight seam steel pipesFirst of all, you need to understand the types of steel pipes1. Divided by type: straight seam steel pipe, seamless steel pipe, spiral steel pipe, etc. 2. Classification of cross-section shape of straight seam steel pipe: square pipe, rectangular pipe, oval t
What are the precautions for the specific use of stainless steel flanges1. To prevent the corrosion between the eyes due to the heating of the flange cover, the welding current should not be too large, about 20% less than the carbon steel electrode, the arc should not be too long, the interlayer coo
Common Defects in Welding Area of Spiral Submerged Arc Welded Steel PipeDefects that are easy to produce in the submerged arc welding area are pores, hot cracks, and undercuts.1. Bubbles. Bubbles mostly occur in the center of the weld bead. The main reason is that hydrogen is still hidden inside the
Pre-welding of straight seam steel pipe:Pre-welding includes seams and welds.1. The joint seam (that is, the forming seam) has no wrong edge or the wrong edge is less than the specified value. Generally, the amount of the wrong edge is less than 8% of the plate thickness, and the maximum is not more
