Seamless Steel Pipe Department Tel: 022-26818163 86658109 Fax: 022-26916479
High-pressure Boiler Tube Department Tel: 022-26738163 86659638 Fax: 022-26916479
Petroleum Cracking Tube Department Tel: 022-26719948 86659738 Fax: 022-86658121
General Manager: Miao Zonghui
Mobile: 13752381288 15332138381
Website: http://www.gb5310-2008.com
Tianjin Zhongjian Huadian Steel Co., Ltd., located in Beichen District, Tianjin City, is mainly a steel distribution center for the production and sales of seamless pipes, alloy pipes, high-pressure boiler tubes, and stainless steel pipes. The company has an inventory of more than a thousand tons throughout the year. The main materials include: 20#, 35#, 45#, 16Mn, 27SiMn, 15CrMo, 12Cr1MoV, 35CrMo, Cr5Mo, 10CrMo910, T91, T11, P22, P23. Standards implemented are GB/T8162-2008 (structural pipe), GB/T8163-2008 (fluid pipe), GB/T3087-2008 (low and medium pressure boiler pipe), GB/T5310-1995 GB5310-2008 (high-pressure boiler pipe), GB/T6479-86 (fertilizer-specific pipe), GB/T9948-88 (petroleum cracking pipe). Stainless steel pipes/plates/bars follow the standards 201(1Cr17Mn6Ni5N), 202(1Cr18Mn8Ni5N), 301(1Cr17Ni7), 304(0Cr18Ni9), 304L(00Cr19Ni10), 304N(0Cr19Ni9N), 309S(0Cr23Ni13), 310S(0Cr25Ni20), 316(00Cr17Nl14Mo2), 316L(00Cr17Nl14Mo2), 317(0Cr19Ni13Mo3), 317L(ooCr19Ni13Mo3), 321(1Cr18Ni9Ti), S41000(0Cr13), 410(1Cr13), 420(2Cr13), 405(0Cr13A100Cr12A1), 430(1Cr17), 430(00Cr18Mo2) with excellent quality at reasonable prices. Our company adheres to the business principle of "Quality First, Reputation Supreme" and will provide high-quality products and services to all new and old customers. General Manager Miao Zonghui and all employees sincerely welcome everyone to visit and guide us.
Three guarantees service: Guarantee of quality, time, and quantity.
Service tenet: Strong strength, high-quality products, low price, first-class service.
Solemn commitment: We guarantee to thank new and old customers' trust with the best products, the highest quality, the lowest price, and the most perfect service.
Business principle: Customer first, high-quality, full range, reasonable price.
Fertilizer Tubes:
High-pressure seamless tubes used in fertilizer equipment (GB6479-2006 fertilizer tube) are suitable for chemical equipment and pipelines operating at temperatures from -40~400℃ and pressures from 10~30Ma. These are made of high-quality carbon structural steel and alloy steel seamless tubes.
1. High-quality carbon structural steel (GB/T699-1999)
Steel contains carbon (C) elements and silicon (Si) (usually no more than 0.40%) and manganese (Mn) (usually no more than 0.80%, up to 1.20% maximum) alloy elements for deoxidation, without other alloy elements (excluding residual elements).
Such steels must ensure both chemical composition and mechanical properties. Their sulfur (S) and phosphorus (P) impurity element content is generally controlled below 0.035%. If controlled below 0.030%, it's called advanced quality steel, and its grade should be followed by "A", such as 20A; if P is controlled below 0.025% and S is controlled below 0.020%, it's called super-grade quality steel, and its grade should be followed by "E". For other residual alloy elements brought into the steel by raw materials, such as chromium (Cr), nickel (Ni), copper (Cu), etc., their content is generally controlled within Cr≤0.25%, Ni≤0.30%, Cu≤0.25%. Some grades have manganese (Mn) content reaching 1.40%, known as manganese steel.
This type of steel improves its mechanical properties by adjusting the carbon (C) content, so according to the level of carbon content, this type of steel can also be divided into:
Low-carbon steel - carbon content is generally less than 0.25%, such as 10, 20 steel, etc.;
Medium-carbon steel - carbon content is