Precautions for spiral steel pipe stacking

Precautions for spiral steel pipe stacking Spiral pipe (SSAW) is a spiral seam carbon steel pipe made of strip steel coil as raw material, often warmly extruded, and welded by automatic double-wire double-sided submerged arc welding process. It is mainly used in water supply engineering, petrochemical, chemical, electric power, agricultural Fluid transportation in the fields of irrigation and municipal buildings: water supply, drainage, sewage treatment engineering, marine water transportation. For natural gas transportation: natural gas, steam, liquefied gas. Construction use: used for piling, bridges, docks, roads, buildings, offshore piling pipes, etc. There should be a certain channel between the stacking of the spiral welded pipe stacking equipment. The width of the inspection channel is generally about 0.5m. The width of the feeding channel depends on the size of the material and the transportation machinery, generally 1.5~2m. The stacking height of spiral steel pipes shall not exceed 1.2m for manual work, 1.5m for mechanical work and 2.5m for stacking width. For example, for steel pipes stacked in the open air, dunnage or strip stones must be placed under the spiral steel pipe, and the stacking surface should be slightly inclined to facilitate drainage. Pay attention to whether the steel pipe is flat to avoid bending and deformation of the steel pipe. If it is stored in the open air, the height of the cement floor should be about 0.3~0.5m, and the height of the sand floor should be between 0.5~0.7m. The strength of the spiral welded pipe is generally higher than that of the straight seam welded pipe, and a narrower blank can be used to produce a large diameter welded pipe, and a blank of the same width can be used to produce a welded pipe with different pipe diameters. However, compared with the straight seam pipe of the same length, the length of the weld is increased by 40~100%, and the production speed is lower. After cutting into a single steel pipe, each batch of steel pipes must be strictly inspected for the first time to check the mechanical properties, chemical composition, fusion condition of the weld, the surface quality of the steel pipe and repair through non-destructive testing to ensure that the pipe-making technology is qualified. to be officially put into production. Post time: Oct-24-2022