spiral pipe This standard covers steel grades L175, L210, L245, L290, L320, L360, L390, L415, L450, L485 and L555, and intermediate grades between L290 and the higher grades listed in table 2.As shown in table 9A and table 9B, ordinary heavy-duty non-threaded phase-extra-light heavy-duty non-rebar pipe and rebar pipe with nominal size greater than 12(see table 6) are marked with outer diameter size.For other steel tubes, the dimensions shall be marked as the nominal dimensions of the steel tubes.
spiral pipe specifications
|Products Name||ssaw spiral welded steel pipe|
|Feature||Low and middle pressure fluid pipeline, boiler, petroleum and natural gas industry, drilling, chemical industry, electric industry, shipbuilding, fertilizer equipment and pipeline, structure, petrochemical, pharmaceutical industry|
|Color||black steel pipe|
|Design||OEM & ODM|
|Certification||CE,ISO 9001:2008 certification|
|Function Description||1.competitive price |
4.package according to client's requirement
|payment terms||LC OR TT|
|Packaging details||as required package|
Double-sided submerged arc welding spiral steel pipe, which has the advantages of high bearing capacity, small resistance, low temperature resistance, corrosion resistance, easy installation and maintenance, etc., is becoming more and more popular in the oil and gas, pulp transport, urban construction and other industries.
Spiral PipeDuring the steel tube forming process, the steel plate deformation is uniform, the residual stress is small, and the surface does not produce scratches.The machined steel pipe has more flexibility in the size and specification range of diameter and wall thickness, especially in the production of high steel grade thick wall steel pipe, especially in the aspect of large diameter thick wall steel pipe, which has incomparable advantages over other processes and can meet more requirements of users in the steel pipe specification.
Spiral Pipe Using the process of pre-welding and then internal and external welding (fine welding), the welding can be realized in the best position, and it is not easy to have defects such as wrong side, welding deviation and lack of penetration, so it is easy to control the welding quality;
Recommended heat treatment temperature: normalizing 850, quenching 840, tempering 600. 45 steel is high quality carbon structure steel, Spiral Pipe the hardness is not high, easy cutting, mold is often used as a template, pin, guide column, but must heat treatment.1. No. 45 steel is qualified if its hardness is higher than HRC55 (up to HRC62) after quenching and before tempering.The highest hardness in practice is HRC55 (high-frequency quenching HRC58).The heat treatment process of carburizing and quenching shall not be used for seamless steel tubes.
Spiral Pipe is widely used in Spiral Pipe all kinds of important structural parts, especially those connecting rod, bolt, gear and shaft which work under alternating load.But the surface hardness is lower, not wear-resisting.The surface hardness of parts can be improved by quenching and tempering.Carburizing treatment is generally used for surface wear, the core of the impact resistant heavy parts, its wear resistance than quenching + surface quenching high.
The Process Flow
has more than ten years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation.
We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel coiled pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.
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