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Protection method for back side of weld seam of argon arc welding of stainless steel pipeline
1. The tube is filled with argon for protection For argon arc welding of stainless steel pipes in petrochemical plant engineering, the method of filling the pipe with argon is generally used to prevent oxidation on the back of the weld. The argon filling methods mainly include argon filling as a ...Read more -
Introduction to Embroidery Removal Technology of Submerged Arc Steel Pipe
1. Cleaning Use solvents and emulsions to clean the surface of the steel to remove oil, grease, dust, smoothing agent, and similar organic matter, but it cannot remove the rust, oxide scale, welding flux, etc. on the surface of the steel, so it is only used as an auxiliary in the defense homework...Read more -
Process characteristics of spiral steel pipe
Spiral steel pipes are mainly used in water supply engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction. It is one of the 20 key products developed in my country. For liquid transportation: water supply and drainage. For ...Read more -
Storage of seamless steel pipes
1) The storage site or warehouse of steel should be in a clean place with unobstructed drainage, far away from factories and mines that produce harmful gases or dust. Weeds and all debris should be removed on the field, and the steel should be kept clean; 2) Do not stack with acid, alkali, salt, ...Read more -
Analysis of accidents prone to occur on the heating surface of boiler steel tubes
1. Long-term over-temperature burst tube Over-temperature refers to metal materials operating at temperatures exceeding the rated temperature. The rated temperature refers to the allowable maximum temperature of the steel during the design life, and can also refer to the rated temperature during ...Read more -
Acceptance standards and methods for spiral steel pipes
1. Acceptance principles for spiral steel pipes The quality inspection and acceptance of spiral welded pipes shall be carried out by the supplier’s technical quality supervision department. The supplier must ensure that the delivered spiral welded pipes comply with the requirements of the c...Read more -
Classification and application fields of steel tees
Steel pipe fittings are also called steel tee fittings or tee fittings. The main pipe adopts a steel tee joint. It has three openings, namely one import and two exports; or two imports and one export. It is a chemical pipeline fitting. It has T-shape, Y-shape, equal-diameter pipe holes, and reduc...Read more -
Internal anti-corrosion treatment method for large diameter spiral steel pipe
The construction of cement mortar fabric should usually be carried out after the spiral steel pipe has been laid, the pressure test has passed, and the covering soil has been compacted according to the planning requirements. Due to the small stiffness and thin wall of the steel pipe, the pipe mus...Read more -
How should thick-walled steel pipes be stacked
1. Angle steel and channel steel should be stacked in the open air, that is, the mouth should be facing down. I-beams should be placed upright, and the I-beam surface of the steel should not be facing up to avoid water accumulation and rust. 2. Corresponding passages should be left between stacks...Read more -
Thin-walled stainless steel pipe construction and installation
1) Thin-walled stainless steel pipes and fittings should not be in direct contact with cement, cement mortar, and concrete. When the pipeline is concealed, anti-corrosion tape should be wrapped around the outer wall of the pipe or plastic-coated thin-walled stainless steel pipe should be used. 2)...Read more -
Why steel pipes need to be heat treated
The function of heat treatment is to improve the material mechanical properties of steel pipes and precision steel pipes, eliminate residual stress and improve the cutting performance of steel pipe metal. According to the different purposes of heat treatment, heat treatment processes can be divid...Read more -
Steel pipe defects and surface problems
1. Quenching cracks in steel pipes The quenching heating temperature of the steel pipe is too high, the heating time is too long, or the heating temperature is seriously uneven, which may easily cause quenching cracks. If the chemical composition of the steel pipe segregates, inclusions in the st...Read more
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