SY/T5040-92 Hydraulic Spiral Carbon Steel Pipe For Foundation Construction

SY/T5040-92 Construction Hydraulic Carbon Spiral Steel Pipe for Foundation Construction

Spiral pipe is also called spiral steel pipe or spiral welded pipe. It is made by rolling low-carbon structural steel or low-alloy structural steel strip at a certain spiral angle (called forming angle) into a tube blank, and then welding the pipe seam. , It can produce large-diameter steel pipes with narrower strip steel.

Commonly used standards for spiral pipes are generally divided into: SY/T5037-2018 (Ministry standard, also known as spiral seam submerged arc welded steel pipe for ordinary fluid transportation pipelines), GB/T9711.1-1997 (National standard, also known as oil and gas industry transportation steel pipe The first part of the technical delivery conditions: Grade A steel pipe (GB/T9711.2 Grade B steel pipe with strict requirements)), API-5L (American Petroleum Institute, also called pipeline steel pipe; which is divided into two grades: PSL1 and PSL2), SY/T5040-92 (Spiral submerged arc welded steel pipe for pile).

Classification:
The spiral seam submerged arc welded pipe for pressure-bearing fluid transportation is mainly used for pipelines that transport oil and natural gas. The steel pipe has strong pressure-bearing capacity and good plasticity, which is convenient for welding and processing. Generally, the spiral seam submerged arc welded pipe for low-pressure fluid transportation adopts double-sided automatic Submerged arc welded steel pipes made by submerged arc welding or single-sided welding for general low-pressure fluid transportation such as water, gas, air and steam.

Features:
Longitudinal welded pipe has simple production process, high production efficiency, low cost and rapid development. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. A narrower blank can be used to produce welded pipes with larger pipe diameters, and a billet with the same width can also be used to produce welded pipes with different pipe diameters. But compared with the straight seam pipe of the same length, the weld length is increased by 30-100%, and the production speed is lower. Therefore, most of the smaller diameter welded pipes use straight seam welding, and the large diameter welded pipes mostly use spiral welding.

Material:
Commonly used domestic spiral pipe materials generally include: Q235A, Q235B, Q345, L245, L290, X42, X52, X60, X70, X80, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb.

Application:
Spiral 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. Used for liquid transportation: water supply, drainage, sewage treatment engineering, mud transportation, ocean water transportation. Used for gas transportation: coal gas, steam, liquefied petroleum gas. For structural purposes: as piling pipes and bridges; pipes for docks, roads, building structures, marine piling pipes, etc.

National standard spiral steel pipe material application:
National standard spiral steel pipe is referred to as 9711.1 spiral steel pipe, 9711.2 spiral steel pipe, material classification: 16Mn spiral steel pipe, Q345B spiral steel pipe, L245 spiral steel pipe, L360 spiral steel pipe, X40-X80 spiral steel pipe, main purpose, spiral steel pipe for sewage treatment, water purification Spiral steel pipes, spiral steel pipes for water plants, spiral steel pipes for power plant chemical enterprises, spiral steel pipes for nuclear power, spiral steel pipes for conveying flammable fluids, spiral steel pipes for conveying non-combustible fluids, national standard spiral steel pipes, and Ministry of Petroleum standard SY/T5037 spiral Steel Pipe. This product uses hot-rolled steel strip as raw material, is formed by regular warm spiral forming, and is welded by automatic submerged arc welding process. The product implements API SPEC 5L, EN10217, GB/T9711.1, GB/T9711.2 standards. Mainly used in the oil and natural gas industry to transport combustible fluids and non-combustible fluids and steel structures.