Seamless steel tubes for low and medium pressure

GB 3087-1999

1.     Scope
This standard stipulates the size, outline, weight, technical requirement, test method, inspection rule, package, mark and quality certificate of seamless steel tube for LP/IP boiler.
This standard is applicable to hot rolling (extruding, expanding) and cold drawing (rolling) seamless steel tube from quality carbon structure steel used for LP/IP boiler and locomotive boiler.

2.     Applicable standard
The following standards constitute a part of this standard. All these standards shall be of valid edition while issuing this standard. Any standard could be revised. So the possibility to use the latest edition of following standards should be discussed by all parties using this standard.
GB/T222-1984   Sampling method used for chemical analysis of steel and the allowable deviation for finished products chemical composition
GB/T223.5-1997      Chemical analysis method of iron, steel and alloy  The determination of acid-soluble silicon content by reduction silicomolybdate photometric method

GB/T 223.12-1991    Chemical analysis method of iron, steel and alloy     The determination of chromium by disphenyl carbazide photometric method after separation with sodium carbonate

GB/T 223.19-1989     Methods for chemical analysis of iron, steel and alloy     The determination of copper by neocuprone extraction photometric method

GB/T 223.23-1994 Chemical analysis method of iron, steel and alloy     The determination of nickel by the dimethyl-glyoxime photometric method

GB/T223.62-1988 Methods for chemical analysis of iron, steel and alloy     The determination of phosphorus content by butyl acetate extraction photometric method

GB/T223.63-1988 Methods for chemical analysis of iron, steel and alloy     The determination of manganese content by sodium (potassium) periodate photometric method

GB/T223.69-1997 Methods for chemical analysis of iron, steel and alloy      The determination of carbon by the gas content method after burning in tube-type furnace

GB/T 223.72-1991 Methods for chemical analysis of iron, steel and alloy      The determination of sulfur content by alumina chromatograph-barium sulfate gravimetric method

GB/T226-1991  Etch test for macrostructure and defect of steels

GB/T228-1987  Metallic materials-Tensile testing at ambient

GB/T241-1997  Metallic materials-Tube hydraulic test

GB/T242-1990     Metallic materials-Tube-Drift expanding test

GB/T244-1997     Method for bend test on tubes of crimp

GB/T245-1997     Method for flanging test on tubes of metals

GB/T246-1997     Method for flattening test on tubes of metals

GB/T699-1999     Quality carbon structural steels

GB/T2102-1998  Checking, Packing, Marking and Quality certification of steel tube

GB/T5777-1996    Methods for ultrasonic testing of seamless steel tube and tubing

GB/T7735-1995    Eddy current testing for the compactness of steel tubes and tubes

GB/T12606-1999   Steel tubes-The testing method of magnetic flux leakage

GB/T17395-1998   Sizes, Shapes, Masses and Tolerances of seamless steel tubes

Yb/t5222-1993      Quality carbon steel tube blank