GB/T 14291-2006 English PDF (GBT14291-2006)

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GB/T 14291-2006: Welded steel tubes for mine liquid service
GB/T 14291-2006
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
H 48
Replacing GB/T 14291-1993
Welded steel tubes for mine liquid service
(ISO 559.1991 Steel tubes for water and sewage, NEQ)
ISSUED ON. FEBRUARY 5, 2006
IMPLEMENTED ON. AUGUST 1, 2006
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Ordering contents ... 6 
4 Dimension, shape and weight ... 6 
5 Technical requirements ... 16 
6 Test methods ... 19 
7 Inspection rules ... 20 
8 Re-inspection and judgment rules ... 20 
9 Packaging, marking and quality certificate ... 20 
Foreword
This Standard corresponds to ISO 559.1991 "Steel tubes for water and sewage"
(English version); the consistent degree is not equivalent.
This Standard replaces GB/T 14291-1993 "Welded steel tubes for mine liquid service".
Compared with GB/T 14291-1993, the main changes of this Standard are as follows.
- Modify the outer-diameter and wall-thickness series;
- Modify the permissible-deviation of outer-diameter and wall-thickness;
- Add the tube-end’s cut-oblique requirements;
- Modify the coefficient of theoretical weight formula; add the weight permissible-
deviation;
- Add the steel designations Q295A, Q295B, Q345A and Q345B; and their
mechanical properties;
- Add the requirements of tube-end weld-seam’s ultrasonic test, after hydraulic test;
- Modify the provision that non-destructive test replaces hydraulic test;
- Modify the bending test and flattening test provisions;
- Modify the group-batching rules.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of the National Steel Standardization
Technical Committee.
Drafting organization of this Standard. Jinxi Steel Tube Co., Ltd.
Main drafters of this Standard. Qi Huijuan, Bi Jingdong, Zhu Xingwei, Xu Shoushan,
Liu Shuochen.
This Standard was first-published in April 19, 1993.
Welded steel tubes for mine liquid service
1 Scope
This Standard specifies the dimension, shape, weight, technical requirements, test
methods, inspection rules, packaging, marking and quality certificate for welded steel
tubes for mine liquid service.
This Standard applies to the straight-seam welded steel tubes that are used for mine
pressured-air, drainage, drainage gas and slurry transportation.
2 Normative references
The following normative documents contain the provisions which, through reference in
this text, constitute the provisions of this Standard. For dated references, the
subsequent amendments (excluding corrections) or revisions of these publications do
not apply. However, the parties who enter into agreements based on this Standard are
encouraged to investigate the possibility of applying the most recent editions of the
normative documents indicated below. For undated references, the latest edition of the
normative document applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T223.5 Steel and iron - Determination of acid-soluble silicon and total silicon
content - Reduced molybdosilicate spectrophotometric method
GB/T 223.10 Methods for chemical analysis of iron, steel and alloy -The cupferron
separation-chrome azurol S photometric method for the determination of aluminium
content
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 iron steel and alloy – The
neocuproine-chloroform extraction photometric method for the determination of
copper content
GB/T 223.23 Methods for chemical analysis of iron, steel and alloy – The
dimethylglyoxime spectrophotometric method for the determination of nickel content
GB/T 223.39 Methods for chemical analysis iron, steel and alloy - The
sulphochlorophenol S photometric method for the determination of niobium content
GB/T 223.59 Methods for chemical analysis of iron, steel and alloy - The reduced
molybdoantimonyl phosphoric acid photometric method for the determination of
phosphorus content
GB/T 223.62 Methods for chemical analysis of iron, steel and alloy - The butyl
acetate extraction photometric method for the determination of phosphorus content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium
(potassium) periodate photometric method for the determination of manganese
content
GB/T 223.68 Methods for chemical analysis of iron, steel and alloy - the potassium
iodate titration method after combustion in the pipe furnace for the determination of
sulfur content
GB/T 223.69 Methods for chemical analysis of iron, steel and alloy - The gas-
volumetric method after combustion in the pipe furnace for the determination of
carbon content
GB/T 228 Metallic Materials - Method for Tensile Testing at Ambient Temperature
(GB/T 228-2002, eqv ISO 6892.1998)
GB/T 241 Metal tubes - Hydrostatic pressure testing
GB/T 244 Metallic materials-Tube - Bend test (GB/T 244-2008, ISO 8491.1998, IDT)
GB/T 246 Metal materials - Tube - Flattening test (GB/T 246-2007, ISO 8492.1998,
IDT)
GB/T 700 Carbon structural steels (GB/T 700-2006, ISO 630.1995, NEQ)
GB/T 1591 High strength low alloy structural steels GB/T 1591-1994, neq ISO 4950-
1.1981, ISO 4950-2.1981, ISO 4951.1981)
GB/T 2102 Acceptance packing marking and quality certification of steel pipe
GB/T 2975 Steel and steel products - Location and preparation of test pieces for
mechanical testing
GB/T 4336 Standard test method for spark discharge atomic emission
spectrometric analysis of carbon and low-alloy steel (routine method)
GB/T 7735 Steel tubes - The inspection method on eddy current test (GB/T 7735-
2004, ISO 9304.1989, MOD)
GB/T 18256 Welded steel tubes (except submerged arc-welded-ultrasonic testing
for verification of hydraulic leak-tightness
GB/T 20066 Steel and Iron - Sampling and preparation of samples for the
determination of chemical composition (GB/T 20066-2006, ISO 14284.1996, IDT)
3 Ordering contents
The contract or order that is based on this Standard shall include the following contents.
a) standard number;
b) product name;
c) steel designation;
d) order quantity (total weight or total length);
e) dimensions (outer-diameter × wall-thickness, in millimeters);
f) delivery status;
g) special requirements.
4 Dimension, shape and weight
4.1 Dimensions
4.1.1 Outer-diameter and wall-thickness
Steel tubes’ nominal outer-diameter (D) and nominal wall-thickness (S) shall comply
with the requirements in Table 1. According to the demand-side’s requirements,
negotiated by both sides, and specified in the contract, it can supply the steel tubes of
which the specifications are out of Table 1.
Table 1 (Continued)
Outer-diameter (D)
/ mm
Nominal wall-
thickness
(S) / mm
Theore...