PDF《GB 9948-2006》

Sunny Steel Enterprise Ltd.

Collect Steel pipe and fitting Resources Http://www.sunnysteel.com E-mail: sales@sunnysteel.com Page:1 of GB9948-2006.doc GB 9948-2006 GB9948-2006 is a national standard specifies classification, code name, dimension, shape, weight, technical requirements, specimen, test methods, test rules, packaging, mark and quality certificate. GB9948-2006 standard is applicable to Seamless steel tubes for petroleum cracking. GB9948 petroleum cracking tube seamless pipe is mainly used in the manufacture of high-pressure and ultra-high pressure boiler super heater tubes, reheated tubes, windpipe, the main steam pipe.. 一般 GB9948 无缝钢管主要用来制造水冷壁管、沸水管、过热蒸汽管、机车锅炉用的过热蒸汽管,大、小烟管及拱砖管等. GB9948-2006 石油裂化管标准无缝管按所承受的高温性能分为一般锅炉管和高压锅炉管.无论一般锅炉管或高压锅炉管按 其用途要求不同又可分为各种钢管. Petroleum cracking tube by high-temperature and high-pressure tube under high temperature flue gas and water vapor will happen to oxidation and corrosion, oil cracking pipe thus requiring a high rupture strength, high oxidation resistance, and good organization stability, made of steel No.: quality carbon structural steel No. 20G 20MnG, 25MnG;

alloy structural steel No. 15MoG, 20MoG 12CrMoG 15CrMoG 12Cr2MoG 12CrMoVG 12Cr3MoVSiTiB etc.;

rust heat-resistant steel commonly used 1Cr18Ni91Cr18Ni11Nb high pressure boiler tube in addition to ensure the chemical composition and mechanical properties, by root to do hydrostatic testing to make flaring, flattening test, high pressure seamless pipes to heat treatment delivery. 主要钢级牌号: 10#, 20#, 12CrMo, 15CrMo, 1Cr2Mo, 1CrSMo, 1Crl9Ni9, 1Crl9NillNb(经协商,也可供应其他特殊牌号的钢管) Sunny Steel Enterprise Ltd. Collect Steel pipe and fitting Resources Http://www.sunnysteel.com E-mail: sales@sunnysteel.com Page:2 of GB9948-2006.doc Chemical Compositions(%) of GB9948-2006: Grade C Mn Si Cr Mo Ni Nb+Ta - -

10 0.07-O.14 O.35-0.65 O.17-0.37 ≤0.15 - ≤0.25 - O.035 0.035

20 O.17-0.24 O.35-0.65 O.17-0.37 ≤O.15 - ≤O.25 - 0.035 O.035 12QM0 0.08-0.15 0.40-O.70 O.17-O.37 0.40-O.70 0.40-O.55 ≤O.30 - O.035 0.035 15CrM0 O.12-0.18 0.40-O.70 0.17-0.37 O.80-1.10 O.40-O.55 ≤0.30 - O.035 0.035 1Cr2M0 ≤0.15 O.30-O.60 0.50-1.00 2.15-2.85 O.45-0.65 - - 0.03 O.035 1Cr5M0 ≤O.15 ≤0.60 ≤0.50 4.00-6.00 O.45-0.60 ≤O.60 - O.030 0.035 1Crl9Ni9 O.04-0.10 ≤2.00 ≤1.00 18.0020.00 - 8.00-11.00 - 0.03 0.035 1Crl9NillNb O.04-O.10 ≤2.00 ≤1.00 17.0020.oo - 9.00-13.00 ≤8C%1.00% 0.03 0.035 Mechanical Properties of GB9948-2006: Grade Tesile ó b/MPa Yield ó s/Mpa(min) Elongation δ5(%)(min) SAFA Aku/J(min) Brinel hardness HBS(max)

10 330-490

205 24 - -

20 410-550

245 21

39 - 12CrMo 410-560

205 21

55 156 15CrMo 440-640

235 21

47 170 1Cr2Mo ≥(390) -175 -22 -92 -179 1CrSMo ≥390

195 22

92 187 1Crl9Ni9 ≥520

205 35 - - 1Crl9NillNb ≥520

205 35 - - Sunny Steel Enterprise Ltd. Collect Steel pipe and fitting Resources Http://www.sunnysteel.com E-mail: sales@sunnysteel.com Page:3 of GB9948-2006.doc The W.T. tolerance of GB9948-2006: 种类 尺寸/mm 允许偏差/mm 长度及允许偏差/m 热轧(扩)管 外径 ≤159 >159 ± 1.00% ± 1.25% 4-12± O.02 壁厚 ≤20 >20 ± 12.5% ± 10.0% 冷拔(轧)管 外径 ≤30 30-50 >50 ± O.20% ± 0.30% ± O.08% 3-10.5± O.02 Overview of petroleum cracking tube Production Method of manufacturing: Generally seamless pipe temperature below

450 ℃, homemade pipe with

10 and

20 carbon structural steel, hot-rolled tubes or cold drawn pipe manufacturing. GB9948 petroleum cracking tube standard seamless pipe is used, often in high temperature and high pressure conditions, under the action of the tube in the high temperature flue gas and water vapor will occur oxidation and corrosion. Steel pipe with high rupture strength, high resistance to oxidation corrosion and good organizational stability. Uses: Generally seamless steel pipes mainly used for manufacturing water wall tube boiling water pipes overheated steam pipe, locomotive boiler overheated steam pipe, large, small smoke pipe and brick arch tubes. GB9948 oil cracking pipe seamless pipe is mainly used for the manufacture of high-pressure and ultra-high pressure boiler superheater tubes, reheater tubes, windpipe, the main stream pipe. Sunny Steel Enterprise Ltd. Collect Steel pipe and fitting Resources Http://www.sunnysteel.com E-mail: sales@sunnysteel.com Page:4 of GB9948-2006.doc Species The GB9948 oil cracking pipe standard seamless pipe according to withstand the high temperature performance is divided into a the general boiler tubes and high-pressure boiler tubes. Whether the the general boiler tubes or high-pressure boiler tube can be divided into its purposes require different kinds of steel pipe. Read more: http://www.sunnysteel.com/blog/index.php/gb9948-2006/ Read more information of seamless steel pipes ? Why seamless steel pipe? Some benefits of Seamless Steel Pipe ? The usage of Carbon steel pipe ? How to produce the steel pipes? ? Cold-Drawn Seamless Pipe Specifications ? The Manufacturing Process of steel pipe ? Steel Pipe and Its Many Uses ? History of Steel Pipe, Steel pipes ? Seamless Tube and Pipe Manufacturing Processes ? Black steel pipe, non-galvanized steel pipe ? Types, Lengths and Ends of Steel pipes ? Comparing American and British Piping Standards ? Seamless tube, Seamless tubing ? Description and Details of steel Pipes Get in Touch If you are interested in our products or cooperating with us, even having a comment or a suggestion please contact us now, for more detailed information. Tel.: +8621

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