Shanghai ShengQiu Materials Co., Ltd

Reliable . Durable . Versatile . Your Top-Tier Source for High-Quality Alloy Steel Pipes   In the world of heavy industry, the integrity of your pipeline is the integrity of your business. At ShangHai ShengQiu Materials Co., Ltd, we bridge the gap between world-class Chinese manufacturing excellence and the rigorous demands of the global market.   Whether you are managing a high-pressure power plant, a complex refinery , or a deep-sea drilling project , our alloy steel pipes are engineered to perform where others fail.   Why Global Partners Choose Us?   1.Superior Material Grades: We offer a comprehensive range of low and high alloy steel, including:   ASTM A213, Grade T5/ T9/ T11/ T12/ T22/ T91 ASTM A335, Grade P5 / P9/ P11/ P12/ P22/ P91 ASTM A519 , SAE4130 / SAE4140 ASTM A334, Gr.1 / Gr.3/ Gr.6  ASTM A333 , Gr.6 EN10216-2 , Grade P235GH /P265GH DIN2391 , ST52 DIN 17175   2.Precision Engineering: Our pipes fe...

How many quality control (QC) checks are required for premium steel pipes before dispatch?   1.Raw material inspection for round steel   Incoming Inspection of Round Bars: We strictly match each procurement batch by verifying Material Test Certificates (MTC) against heat numbers , lengths, diameters, and surface conditions. This ensures full traceability to prevent material mixing at the source and guarantees that no sub-standard materials are used.   2.Wall Thickness Variation Inspection of Pierced Hollows   During the piercing process , we inspect the wall thickness variation and surface quality of the hollow shells . If any issues such as out-of-tolerance dimensions or guide shoe marks are detected, immediate adjustments are made.   3.Dimensional & Surface Inspection for Pierced Hollows   Inspect dimensions and surface quality after cooling to ensure the hollow shells meet quality standards.   4.IPQC (In-Process Q...

Purchasing Guide for Petroleum Cracking Seamless Tubes   Ensuring Safety and Efficiency in Oil & Gas Operations In the oil and gas sector, petroleum cracking tubes are core components of critical equipment; their quality directly dictates the safety and efficiency of extraction operations. Because the petroleum cracking process involves high temperatures, high pressures, and corrosive media, these components must be manufactured using high-quality seamless steel pipes to ensure reliable equipment operation and a long service life.   I. Key Performance Requirements   1. High-Temperature and High-Pressure (HTHP) Resistance The petroleum cracking process typically operates at elevated temperatures ranging from 400°C to 800°C and high pressures between 10 MPa and 30 MPa . This requires seamless steel pipes to possess: ·        Excellent High-Temperature Strength: Maintaining structural integrity under thermal stress. ...

Uses of ASTM A335Steel Pipe   ASTM A335 is the standard specification for seamless ferritic alloy-steel pipe intended for high-temperature service . It is often referred to as "Chrome-Moly" pipe due to the addition of Chromium (Cr) and Molybdenum (Mo) to the steel, which significantly enhances its strength, corrosion resistance, and ability to withstand high temperatures and pressures.   1.Primary Applications (Industries)   1)Power Generation Industry 2)Petrochemical Industry 3)Oil and Gas Refining (Refineries) 4)Chemical Processing   2.Key Characteristics Driving its Use   The suitability of ASTM A335 for these demanding applications is primarily due to its material composition and resulting properties:   1)High-Temperature Resistance: It is designed to operate stably in extreme heat, with some grades withstanding temperatures up to 600 ℃ to 70 0 ℃ . 2)High Strength: The alloy composition provides excellent tensile an...

Alloy Steel Pipes   ASTM A213 , Grade T5/ T9/ T11/ T12/ T22/ T91 ASTM A335 , Grade P5/ P9/ P11/ P12/ P22/ P91 ASTM A519 SAE4130/ SAE4140 ASTM A334 Gr.1/ Gr.3/ Gr.6  ASTM A333 Gr.6 EN10216-2 , Grade P235GH/P265GH EN10210, Grade S235JRH, S275J0H, S275J2H, S355J0H, S355J2H, S355K2H DIN2391 ST52 DIN 17175, ST35.8, ST45.8   Feel free to contact us at any time if you are interested in these products.   Shanghai ShengQiu Materails Co., Ltd WhatsApp: 008613761124029 Email: sales@sqsteelpipe.com Website: www.sqsteelpipe.com  

Why Seamless Steel Pipes Dominate High-Pressure Environments   Seamless steel pipes are the irreplaceable "strongman" of the industrial sector, chosen for their unique structural integrity and superior performance in extreme, high-pressure operating conditions.   Key Advantages:   ·        Inherent Structural Integrity: Manufactured by piercing a solid billet , seamless pipes have an intact metal streamline with no weld seams . This uniform structure avoids defects (like residual stresses ) found in welded pipes, ensuring even stress distribution under high pressure and significantly enhancing pressure-bearing capacity .   ·        Precise Material Control: Material properties ( strength , plasticity , toughness ) are precisely controlled using heat treatments like normalizing and tempering . This adjustability allows the pipes to meet the strict requirements of different pressure ra...