Chinese Standard- GB

Guobiao GB in the People’s Republic of China is the abbreviation of Guojia Biaozhun, meaning the “National Standards”, or Guojia Biaozhun Ma, meaning the “National Standard Encoding” as Chinese character encoding system. Both are issued by the Standardization Administration of China, the Chinese National Committee of the ISO and IEC.

View the main GB standard for steel pipes and pipe fittings as below:

GB/T18984-2003 Low-temperature heat exchanger tubes seamless steel pipe

GB/T18984-2003 Standard specifies seamless steel tubes for low temperature piping classification code, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate.

GB/T18984-2003, Low-temperature heat exchanger tubes seamless steel pipe

GB/T18984-2003 standard suitable for -49 to -148 degrees F cryogenic pressure vessel piping, and low-temperature heat exchanger tubes seamless steel pipe.

And then calculate a steel pipe and tube theoretic weight.PDF


  • Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.
  • Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.
  • How to packing the seamless pipes?


  • Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
  • Weight of bundle – up to 5000 kg upon request of customer.
  • Each bundle is furnished with three tags.
PDF View the PDF catalogue of  GB T18984-2003

GB6479-2000, Seamless steel tubes for high-pressure for chemical fertilizer equipments

GB6479-2000 is a national standard specifies Seamless steel tubes for high-pressure for chemical fertilizer equipments. GB6479-2000 standard is applicable to High Pressure Seamless Pipe for For Chemical Fertilizer Equipment . GB9948 petroleum cracking tube seamless pipe is mainly used in the high temperature and high pressure fluid pipes mainly used for fertilizer equipment.

PDF View the PDF catalogue of GB6479-2000 Standard specification

GB5310 Standard 

The GB5130 standard is mainly used to manufacture high pressure and above pressure steam boiler tubes with high quality carbon structural.

GB5310钢管材质:20G20MnG, 25MnG,16Mn,15Mog, 20MOG, 15CrMo, 15CrMoG,12Cr1MoVG,Cr5Mo,10CrMo910, 12Cr2MoG12Cr1MoV

PDF View the PDF catalogue of GB5310-2008 Standard specification

GB9948 Standard

GB9948 standard specifies the seamless steel pipe is mainly used to make high and above pressure steam boiler tubes with high-quality carbon structural steel, alloy structural steel and heat-resistant stainless steel high-pressure seamless pipe.

PDF View the PDF catalogue of  GB9948-2006 Standard specification


GB3087-2008 is applicable to the seamless steel tubes that are made of quality carbon structural steels and used for manufacturing various low and medium pressure boilers.

PDF View the PDF catalogue of GB 3087-2008 Standard Specifictaion

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