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The welded pipe should ensure that the water pressure test, the tensile strength of the weld and the cold bending performance should meet the requirements.
Spiral seam submerged arc welded steel pipe SY5036-83 for pressurized fluid transportation is mainly used for transporting oil and natural gas pipelines;
Spiral seam high frequency welded steel pipe SY5038-83 for pressure fluid transportation, welded by high frequency lap welding method, for spiral seam high frequency welded steel pipe for pressure fluid transportation. The steel pipe has strong bearing capacity, good plasticity, easy to weld and process;
General low-pressure fluid transport with spiral seam submerged arc welded steel pipe SY5037-83, the use of double-sided automatic submerged arc welding or single-side welding method for water, gas, air and steam and other general low-pressure fluid transport submerged arc welded steel pipe.
Now the commonly used standards for spiral steel pipes are generally divided into :SY/T5037-2000(Ministry standard, also known as spiral seam submerged arc welded steel pipes for ordinary fluid transportation pipes)
GB/T9711.1-1997(National standard, also known as the oil and gas industry steel pipe delivery technical conditions ** part: Class A steel pipe (up to now there are strict requirements of GB/ T9711.2-B steel pipe))
API-5L(American Petroleum Institute, also called pipeline steel pipe; Which is divided into PSL1 and PSL2 two levels), SY/T5040-92(spiral seam submerged arc welded steel pipe for pile).
National standard GB/ T9711.1-1997
Ministry of Petroleum Industry Industry standard SY/T5037-2000
USA APISPEC 5L welded steel pipe standard
Q195 is a carbon structural steel with yield strength of 195MPA and advantages of high plasticity, toughness and weldability.
Q195 Chemical composition (%)
C:≤0.12, Mn:≤0.50, Si:≤0.30, S:≤0.040, P:≤0.035
Tensile strength
315-430 (σb/MPa)
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Q235A ingredients: Mn - 0.30-0.65, the Si - 0.3, S -- 0.05, p - 0.045;
Q235B ingredients: Mn - 0.30-0.70, the Si - 0.3, S P - 0.045-0.045.
The carbon content of steel made of Q235A is between 0.14-0.22%, and the carbon content of steel made of Q235B is between 0.12-0.20%. Secondly, in tensile and impact experiments;material Q235A steel does not do impact test, material Q235B steel to do room temperature impact test, V-notch.
The mechanical properties of steel made of Q235B are stronger, and the mechanical properties of steel made of Q235A are weaker.
Q235B is stronger in welding performance, while Q235A is weaker.
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Q355A Chemical composition (%) : C: 0.18-0.28, Mn: 0.40-0.70, Si:≤ 0.30, S: ≤0.050 or less , P:≤ 0.045
Q355B Chemical composition (%) : C: 0.18-0.28, Mn: 0.40-0.70, Si:≤ 0.30, S: ≤0.045 or less , P:≤ 0.045
Mechanical properties:
Tensile strength (σb/MPa):410-550
Elongation (δ5/%):
≥24(a≤16mm), ≥23(a>16-40mm)
≥22(a>40-60mm), ≥21(a>60-100mm)
≥20(a>100-150mm), ≥19(a>150mm)
Where a is the thickness or diameter of the steel.
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Tianjin TISCO is a professional steel supplier. With the support of the most professional steel manufacturers and a large number of customers, we can not only provide you with ordinary steel, but also help you customize special steel, special size, special process shape and other services.
Tianjin TISCO uses standard export transport packaging and bundles steel bands according to the size of the stainless steel plate. We have frequent cooperation with freight forwarders to ensure the safe arrival of goods to the port.
According to our shipping experience, a 20-foot container can hold 22 tons of stainless steel, and a 40-foot container can hold 25 tons of stainless steel. For larger orders, we ship by bulk carrier, which is cheaper. Packaging can also be customized according to customer needs.
We provide our customers with planning services, just-in-time production planning and provide customized services to meet the specific requirements of end users. Our company has been committed to improving customer service and product quality for more than ten years, providing high-value solutions for customers' businesses as the basic standard of our work.
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