GB/T 33156-2016 English PDF (GBT33156-2016)

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GB/T 33156-2016: Precision welded tubes for gas spring
GB/T 33156-2016
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.75
H 48
Precision Welded Tubes for Gas Spring
ISSUED ON: OCTOBER 13, 2016
IMPLEMENTED ON: SEPTEMBER 01, 2017
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Classification, code ... 6 
4 Ordering content ... 7 
5 Size, shape, weight and allowable deviation ... 7 
6 Technical requirements ... 10 
7 Inspection and test methods ... 14 
8 Test rules ... 15 
9 Packaging, marking and quality certificate ... 15 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee
183 on Iron and Steel of Standardization Administration of China (SAC/TC 183).
The drafting organizations of this Standard: Jiangsu DOM Corporation Limited,
Qingdao Sanhong Precision Instrument Co., Ltd.
The drafters of this Standard: Zhou Feiyao, Pu Chengfu, Bao Yongli, Zhang
Qixu, Yao Zhiqiang, Jiang Xiaojun, Yu Qingwen.
Precision Welded Tubes for Gas Spring
1 Scope
This Standard specifies the classification, code, size, shape, weight and
allowable deviation, technical requirement, inspection and test method,
inspection rule, packaging, marking and quality certificate of precision welded
tubes for gas spring.
This Standard applies to cold-drawn or cold-rolled precision welded tubes for
gas spring (including seat air pressure bars and lifters) in machinery
manufacturing, vehicle manufacturing, and furniture products.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
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 aluminium content.
Chrome azurol S photometric method
GB/T 223.11, Iron, steel and alloy. Determination of chromium content. Visual
titration or potentiometric titration 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 223.18, Methods for chemical analysis of iron steel and alloy. The
sodium thiosulfate separation iodometric method for the determination of
cupper 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, Iron, steel and alloy. Determination of nickel content. The
dimethylglyoxime spectrophotometric method
GB/T 223.26, Iron, steel and alloy. Determination of molybdenum content.
The thiocyanate spectrophotometric method
GB/T 223.32, Methods for chemical analysis of iron, steel and alloy. The
hypophosphite reduction-iodometric method for the determination of arsenic
content
GB/T 223.37, Methods for chemical analysis of iron, steel and alloy. The
indophenol blue photometric methods 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 223.53, Methods for chemical analysis of iron, steel and alloy. The
flame atomic absorption spectrophotometric method for the determination of
copper content
GB/T 223.58, Methods for chemical analysis of iron, steel and alloy. The
sodium arsenite-sodium nitrite titrimetric 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 223.60, Methods for chemical analysis of iron, steel and alloy The
perchloric acid dehydration gravimetric method for the determination of
silicon 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 223.64, Iron, steel and alloy. Determination of manganese content.
Flame atomic absorption spectrometric method
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 223.71, Methods for chemical analysis of iron, steel and alloy The
gravimetric method after combustion in the pipe furnace for the determination
of carbon content
GB/T 223.72, Iron, steel and alloy - Determination of sulfur content.
Gravimetric method
GB/T 228.1, Metallic materials. Tensile testing - Part 1: Method of test at
room temperature
GB/T 242, Metal materials. Tube. Drift-expending test
GB/T 246, Metal materials. Tube. Flattening test
GB/T 700, Carbon structural steels
GB/T 1031, Surface roughness parameters and their values
GB/T 1591, High strength low alloy structural steels
GB/T 2102, Acceptance, packing, marking and quality certification of steel
pipe
GB/T 2975, Steel and steel products. Location and preparation of samples
and test pieces for mechanical testing
GB/T 4336, Carbon and low-alloy steel. Spark discharge atomic emission
spectrometric method (routine method)
GB/T 7735-2004, Steel tubes. The inspection method on eddy current test
GB/T 20066, Steel and iron. Sampling and preparation of samples for the
determination of chemical composition
GB/T 20123, Steel and iron. Determination of total carbon and sulfur content
Infrared absorption method after combustion in an induction furnace (routine
method)
GB/T 20125, Low-alloy steel. Determination of multi-element contents.
Inductively coupled plasma atomic emission spectrometric method
3 Classification, code
Steel pipes are divided into five classifications according to the delivery state,
and their classifications and codes are:
a) cold drawing or cold rolling / hard state: +C;
b) cold drawing or cold rolling / soft state: + LC;
c) stress-relief annealing state: +SR;
d) annealing state: +A;
e) normalizing state: +N.
4 Ordering content
The contract or order form that orders steel pipes according to this Standard
shall include the following:
a) number of this Standard;
b) product name:
c) steel grade (quality grade);
d) dimensions;
e) ordering quantity (total weight or total length);
f) delivery state;
g) manufacturing method;
h) special requirements.
5 Size, shape, weight and allowable deviation
5.1 Outer diameter, inner diameter and w...