Shanghai ShengQiu Materials Co., Ltd

Carbon Steel Seamless Tubes   ASTM A106 , Grade B; ASTM A53 , Gr.A,Gr.B; API 5L :Gr.A,Gr.B, X42,X46,X52,X56,X60,X65  API 5CT , Grade H40/ J55/ K55/ N80-1/ N80Q/ R95/ L80-1/ C90-1/ T95-1/ P110/ Q125-1/C110 ASTM A335 , Grade P5/P9/P11/P22/P91;  ASTM A519 SAE4130 /SAE4140; ASTM A213 , Grade T5/ T9/ T11/ T12/ T22/ T91 ASTM A335, Grade P5/ P9/ P11/ P12/ P22/ P91 ASTM A334 Gr.1/ Gr.3/ Gr.6  ASTM A333 Gr.6 EN10216-2 , Grade P235GH/P265GH DIN2391 ST52 DIN 17175   Contact our team for a fast quote if you are interested.   Shanghai ShengQiu Materials Co., Ltd WhatsApp: 008613761124029 Email: sales@sqsteelpipe.com Website: www.sqsteelpipe.com  

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. ...