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 superheater tubes, reheater tubes, windpipe, the main steam pipe.
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 organizationstability, 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.
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.
- 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 steam pipe.
- 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.
Chemical Compositions(%) of GB9948-2006：
Mechanical Properties of GB9948-2006：
The W.T. tolerance of GB9948-2006：
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|View the PDF catalogue of GB9948-2006 Standard specification|