GB/T 30063-2013 English PDF (GBT30063-2013)

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GB/T 30063-2013: Longitudinal submerged arc welded steel tubes for structural purpose
GB/T 30063-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
H 48
Longitudinal submerged arc welded steel tubes for
structural purpose
ISSUED ON. DECEMBER 17, 2013
IMPLEMENTED ON. SEPTEMBER 01, 2014
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Ordering content ... 6 
4 Dimension, shape, weight and allowable deviations ... 7 
5 Technical requirements ... 11 
6 Test methods ... 17 
7 Inspection rules ... 18 
8 Packaging, marking and quality certificate ... 18 
Longitudinal submerged arc welded steel tubes for
structural purpose
1 Scope
This standard specifies the dimensions, shape, weight, technical requirements,
test methods, inspection rules, markings, packaging and quality certificates for
longitudinal submerged arc welded steel tubes for structural purpose.
This standard is applicable to longitudinal submerged arc welded steel tubes,
which have an outer diameter not less than 400 mm, for buildings, bridges,
towers, piles, struts and other general structures (hereinafter referred to as
“steel tubes”). It is not applicable to steel tubes for mechanical structures.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total
silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.9 Iron steel and alloy - Determination of aluminum content -
Chrom-azurol S photometric method
GB/T 223.12 Methods for chemical analysis of iron, steel and alloy - The
sodium carbonate separation-diphenyl carbazide photometric method for the
determination of chromium content
GB/T 223.14 Methods for chemical analysis of iron, steel and alloy - The N-
Benzoy-N-Phenylhydroxylamine extraction photometric method for the
determination of vanadium content
GB/T 223.16 Methods for chemical analysis of iron, steel and alloy - The
chromotropic acid photometric method for the determination of titanium
content
GB/T 223.19 Methods for chemical analysis of steels and alloys - The 2,9-
dimethyl-1,10-phenanthroline-trichloromethane extraction
spectrophotometric method for the determination of copper content
GB/T 223.26 Iron, steel and alloy - Determination of molybdenum content -
The thiocyanate spectrophotometric method
GB/T 223.37 Methods for chemical analysis of iron, steel and alloy - The
indophenol blue photometric method for the determination of nitrogen
content after distillation separation
GB/T 223.40 Iron, steel and alloy - Determination of niobium content by the
sulphochlorophenol S spectrophotometric method
GB/T 223.54 Methods for chemical analysis of steels and alloys - The flame
atomic absorption spectrophotometry for the determination of nickel content
GB/T 223.58 Methods for chemical analysis of steels and alloys - The
sodium arsenite-sodium nitrite titration method for the determination of
manganese content
GB/T 223.59 Iron, steel and alloy - Determination of phosphorus content -
Bismuth phosphomolybdate blue spectrophotometric method and antimony
phosphomolybdate blue spectrophotometric method
GB/T 223.68 Methods for chemical analysis of iron steel and alloy - The
combustion potassium iodate volumetric method for the determination of
sulfur content
GB/T 223.69 Iron, steel and alloy - Determination of carbon contents - Gas-
volumetric method after combustion in the pipe furnace
GB/T 228.1 Metallic materials - Tensile testing - Part 1 . Method of test at
room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 700 Carbon structural steels
GB/T 1591 High strength low alloy structural steels
GB/T 2102 Acceptance packing marking and quality certification of steel tube
GB/T 2653 Bend test methods on welded joints
GB/T 2975 Steel and steel products - Location and preparation of test pieces
for mechanical testing
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element
contents - Spark discharge atomic emission spectrometric method (routine
The difference of tube diameter of the steel tube is the absolute value of the
difference between the outer diameters of the both ends of the same steel tube.
The outer diameter shall be measured within a range of 25 mm from the tube’s
end, the difference of the steel tube shall comply with the requirements of Table
2.
According to the requirements of the purchaser, through negotiation between
the supplier and the purchaser, and as indicated in the contract, it may supply
the steel tubes of other outer diameter differences than those as specified in
Table 2.
4.3 Out-of-roundness
For steel tubes with a ratio of outer diameter to wall thickness not exceeding 75,
the out-of-roundness shall neither exceed 1.0% nor exceed 15 mm. According
to the requirements of the purchaser, through negotiation between the supplier
and the purchaser, and as indicated in the contract, it may supply the steel tubes
of other specified out-of-roundness.
For steel tubes with a ratio of outer diameter to wall thickness exceeding 75,
the out-of-roundness is determined through negotiation between the supplier
and the purchaser.
4.4 Curvature
The curvature per meter of the steel tube shall not exceed 1.5 mm, the full-
length curvature shall neither exceed 0.1% of the length of the steel tube nor
exceed 10 mm.
4.5 Tube’s end
The chamfer of the end faces at both ends of the steel tube shall not exceed 3
mm, the chamfer is as shown in Figure 1. The cutting burrs shall be removed.
The end face of the steel tube shall be delivered in a flat end. According to the
requirements of the purchaser, through negotiation between the supplier and
the purchaser, and as indicated in the contract, the end face of the steel tube
may be grooved, the groove angle shall be , the blunt edge is 1.6 mm ±
0.8 mm. The groove and the blunt edge are as shown in Figure 2.
Steel tubes shall be delivered in welded status. According to the requirements
of the purchaser, through negotiation between the supplier and the purchaser,
and as indicated in the contract, the steel tube may be delivered in the overall
heat treatment status.
5.4 Mechanical properties
5.4.1 Longitudinal tensile test of steel tube
The longitudinal tensile mechanical properties of the base metal of steel tubes
of each designation shall comply with the requirements of Table 4 and Table 5,
respectively.
5.4.2 Transverse tensile test of steel tube
According to the requirements of the purchaser, through negotiation between
the supplier and the purchaser, and as indicated in the contract, the steel tube
may be subjected to transverse tensile test of the base metal. The transverse
tensile mechanical properties of steel tubes of each designation shall meet the
requirements of Table 4 and Table 5, respectively.
5.4.3 Tensile test of welded joints
The steel tube shall be subjected to the tensile test of longitudinal welded joints.
When the welded joint is...