GB/T 33814-2017 PDF in English
GB/T 33814-2017 (GB/T33814-2017, GBT 33814-2017, GBT33814-2017)
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Welded H-section steel
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Standards related to (historical): GB/T 33814-2017
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GB/T 33814-2017: PDF in English (GBT 33814-2017) GB/T 33814-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.70
H 44
Welded H-section steel
ISSUED ON. MAY 31, 2017
IMPLEMENTED ON. FEBRUARY 01, 2018
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 content ... 5
4 Code and specification representation method ... 6
5 Dimension, shape, weight and permissible deviation ... 6
6 Technical requirements and production ... 12
7 Inspection rules ... 14
8 Packaging, marking and quality certificate ... 19
Annex A (informative) Cross-sectional dimension, cross-sectional area,
theoretical weight and cross-sectional characteristic parameters of welded H-
section steel ... 21
Welded H-section steel
1 Scope
This Standard specifies the ordering content, code and specification
representation method, dimension, shape, weight and permissible deviation,
technical requirements and production, inspection rules, packaging, marking
and quality certificate of welded H-section steel.
This Standard applies to the selection, fabrication and acceptance of welded
H-section steel.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
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 232 Metallic materials - Bend test
GB/T 699 Quality carbon structure steels
GB/T 700 Carbon structural steels
GB/T 712 Ship and ocean engineering structural steel
GB/T 714 Structural steel for bridge
GB/T 1591 High strength low alloy structural steels
GB/T 2101 General requirement of acceptance, packaging, marking and
certification for section steel
GB/T 2537 Carbon dioxide for welding
GB/T 2975 Steel and steel products - Location and preparation of samples
and test pieces for mechanical testing
technical contents.
a) Product name and model, specifications;
b) Steel grades;
c) Standard number;
d) Delivery length;
e) Weight and quantity;
f) Other special requirements proposed by the demand party, including
special specifications, special surface quality requirements, etc.
4 Code and specification representation method
4.1 Code
The code of welded H-section steel is WH, where “W” represents welded and
“H” represents H-section steel.
4.2 Specification representation
The specification of welded H-section steel shall be expressed in the following
form.
WH height (H) × width (B) × web thickness (t1) × flange plate thickness (t2).
Example. WH1500 × 500 × 18 × 30
5 Dimension, shape, weight and permissible deviation
5.1 Dimension and representation method
5.1.1 The cross-sectional view and symbols of welded H-section steel are
shown in Figure 1.
5.3 Weight and permissible deviation
Welded H-section steel shall be delivered according to the theoretical weight
(the theoretical weight shall be calculated regarding the density as 7.85 g/cm3).
Agreed upon between he supply and demand parties and specified in the
contract, it may delivery according to the actual weight. Unless contracted, the
weight deviation of a single piece of welded H-section steel shall not exceed
±6 %, and the weight deviation of batch delivery shall not exceed ±4 %.
6 Technical requirements and production
6.1 Steel
6.1.1 Steel used for welded H-section steel shall comply with the specifications
of relevant standards such as GB/T 699, GB/T 700, GB/T 712, GB/T 714, GB/T
1591, GB/T 3274, GB/T 4171, GB/T 19879. When the welded H-section steel
adopts Z-direction performance steel, the Z-direction performance of the steel
shall comply with the specifications of GB/T 5313. Agreed upon between he
supply and demand parties and specified in the contract, steels specified in
other standards may also be used.
6.1.2 When the surface of the steel used for welded H-section steel has defects
such as rust, pitting or scratch, the depth shall not exceed one-half of the
negative permissible deviation of the thickness of the steel. The defects on the
surface of the steel shall be allowed to be removed by mechanical means such
as shoveling and polishing, and allowed to be repaired by welding; the repair
process and quality inspection shall comply with the specifications of GB 50661.
6.1.3 The site reinspection rules for the chemical composition and the
mechanical properties of the steel used for welded H-section steel shall comply
with the specifications of GB 50205.
6.2 Welding materials
6.2.1 The welding material used for welded H-section steel shall comply with
the specifications of relevant standards such as GB/T 2537, GB/T 4282, GB/T
5117, GB/T 5118, GB/T 5293, GB/T 8110, GB/T 10045, GB/T 12470, GB/T
17493.
6.2.2 The welding material used for welded H-section steel shall be re-
inspected according to the production batch number. If the source of the
certified product is stable and the three consecutive batches pass the site
reinspection on the very first try, the capacity of the inspection batch may be
doubled for the site reinspection. In the case of the inspection after the
expansion of the inspection batch, if it fails, it shall be re-accepted before the
6.4.1 Welders engaged in the manufacture of welded H-section steel shall take
technical qualification examinations according to the requirements of steel type,
welding joint form, welding method, welding position, etc., and obtain the
corresponding certificate of conformity. The certified welder shall weld within
the recognize range of the certificate of conformity.
6.4.2 Welding technicians and welding inspectors engaged in the manufacture
of H-section steel shall comply with the relevant specifications of CECS 331
and obtain corresponding qualification certificates.
6.4.3 When the contract drawings or technical documents require post-weld
heat treatment, the heat treatment process, equipment and personnel shall
comply with the specifications of relevant standards.
7 Inspection rules
7.1 Inspection and acceptance
7.1.1 The Inspection and acceptance of welded H-section steel finished
products shall be organized by the quality supervision department of the
production organization.
7.1.2 The production organization shall ensure that the delivered steel meets
the requirements of this Standard or the contract. The demand party has the
right to inspect and accept any of the inspection items specified in this Standard
or contract.
7.2 Batching rules
The inspection batch of welded H-section steel shall be determined according
to product specification, raw material and welding process. The same batch of
welded H-section steel shall have the same specification, using steel and
welding materials of the same grade (model), quality grade, delivery conditions,
and using the same processing and welding process; each batch is not more
than 300 t.
7.3 Sampling rules
7.3.1 The sampling method for the chemical composition inspection of welded
H-section steel shall be in accordance with the relevant specifications of GB/T
20066. The sampling part and sampling method of the mechanical property test
shall be in accordance with the relevant specifications of GB/T 2975. If the
manufacturer can provide the corresponding raw material site reinspection
reports and traceability materials, the finished product inspection may be
exempted from the sampling test of chemical and mechanical properties, or the
7.5.2 Non-destructive testing
7.5.2.1 The non-destructive testing shall be carried out after passing the
appearance inspection. Specifically, it shall comply with the relevant
specifications of GB 50661-2011.
7.5.2.2 For welds required full penetration, the test for internal imperfections
shall comply with the following specifications.
a) Grade I welds shall be 100 % tested, and the qualification level shall
comply with the requirements of level II or above level II of Grade B
inspection in GB 50661-2011;
b) Grade II welds shall be subjected to sampling inspection. The sampling
inspection ratio shall not be less than 20 %. The qualification level shall
comply with the requirements of level III or above level III of Grade B
inspection in GB 50661-2011.
7.5.2.3 Grade III welds shall be tested in accordance with design requirements.
7.5.2.4 In the case of one of the following conditions, it should ultrasonically test
the flange plate at the joint groove before welding or test the layered tear of the
flange plate after welding.
a) It is found that the steel plate has an interlayer imperfection;
b) Non-Z-direction performance steel plates with the thickness of flange plate
and web of not less than 20 mm;
c) The thickness of web is greater than that of flange plate, and the working
stress perpendicular to the thickness direction of the flange plate is greater.
7.5.2.5 Radiation test method may be used to supplement the test as needed.
7.5.2.6 Radiation testing shall comply with the relevant specifications of GB/T
3323-2005. The quality grade of radiography shall comply with the
requirements of Grade B. The qualification grade of Grade I welds shall be
Grade II and above, and the qualification grade of Grade II welds shall be Grade
III and above.
7.5.2.7 In the case one of the following conditions, it shall carry out surface non-
destructive testing.
a) The design document requires surface non-destructive testing;
b) When cracks are found in the appearance inspection, 100 % surface non-
destructive testing shall be carried out for similar welds in the batch;
and the qualified ones can still be delivered.
7.7.2 The results of sampling inspection of welds shall be judged according to
the following specifications.
a) If the rejection rate of welds in the sampling inspection is less than 2 %,
the acceptance of the batch is qualified;
b) If the rejection rate of welds in the sampling inspection exceeds 5 %, the
acceptance of the batch is unqualified;
c) if the rejection rate of welds in the sampling inspection is 2 % ~ 5 %, it
shall double the samples for inspection, and one weld extension line on
both sides of the original unqualified part shall be added, and the failure
rate shall be exceeded in all the sampling welds. If it is not more than 3%,
the batch is qualified; if it is more than 3%, the batch is unqualified;
d) When the batch acceptance is unqualified, all the remaining welds in the
batch shall be inspected;
e) If a crack defect is found in the inspection, it shall double the samples for
inspection. If the crack defect is not found again in the double-sampling
inspection, the acceptance of the batch is qualified. If many crack defects
are found in the inspection or the crack defects are found in the double-
sampling inspection, the acceptance of the batch is unqualified, all the
remaining welds in the batch shall be inspected;
f) The supply party shall repair the unqualified welds in accordance with the
relevant specifications of GB 50661-2011, and deliver them after passing
the reinspection.
8 Packaging, marking and quality certificate
8.1 Welded H-section steel shall be marked with the name or registered
trademark of the manufacturer by means of stamping, spraying or affixing. The
marking shall be clear and the marking location shall be at the end of the web.
8.2 Welded H-section steel finished products shall be marked with the factory-
exit number, the grade of the steel used and the inspector's symbol or steel
letter for examination.
8.3 Each batch of welded H-section steel shall be accompanied by a quality
certificate issued by the supply party, which states.
a) the name of the demand party and the contract number;
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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