NB/T 47052-2016 English PDF (NB/T47052-2016)

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NB/T 47052-2016: Simple pressure vessels
NB/T 47052-2016
NB
ENERGY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 23.020.30
J 74
Simple pressure vessels
简单压力容器
ISSUED ON: AUGUST 16, 2016
IMPLEMENTED ON: DECEMBER 01, 2016
Issued by: National Energy Administration
Table of Contents
Foreword ... 5
1 Scope ... 6
2 Normative references ... 7
3 Terms and symbols ... 8
4 Product type and product type code ... 11
5 General provisions ... 12
6 Materials ... 16
7 Design ... 18
8 Manufacturing, inspection, acceptance ... 21
Appendix A (Normative) Declarations of conformity and amendments to standards 34
Appendix B (Informative) Product type code ... 35
Appendix C (Informative) Commonly used welded joint structures ... 37
Simple pressure vessels
1 Scope
1.1 This standard specifies the construction requirements for the type and materials,
design, manufacturing, inspection and acceptance of simple pressure vessels
(hereinafter referred to as "vessels").
1.2 This standard applies to mass-produced vessels, that meet the following conditions:
a) The design pressure is less than or equal to 1.6 MPa;
b) The design temperature is greater than or equal to -20 °C; the maximum operating
temperature is less than or equal to 150 °C;
c) The volume is less than or equal to 1.0 m3;
d) The product of working pressure and volume is less than or equal to 1.0 MPa·m3;
e) The medium is air, nitrogen, carbon dioxide, inert gas, water vapor evaporated
from medical distilled water, or a mixture of the above gases (vapors); the
medium is allowed to contain other components such as oil that are not enough
to change the characteristics of the medium, but its flash point or ignition point
shall be 30 °C higher than the maximum working temperature of the vessel,
without affecting the compatibility with the material;
f) The structure meets the requirements of 4.1.1.
1.3 The following products do not fall within the scope of this standard:
a) Vessels used in military equipment, nuclear facilities, aerospace vehicles, offshore
facilities, ships;
b) Non-independent pressure-bearing parts on the machine (such as compressor
cylinder, etc.);
c) Fire extinguisher;
d) Quick opening vessel;
e) Mobile vessels;
f) Vessels that require fatigue analysis and design;
c) The design organization shall keep the following design documents of the vessel
for reference, meanwhile the retention period shall not be less than the design
service life of the vessel:
1) Design drawing;
2) Design calculations, including at least volume calculations, strength
calculations or explosion test reports (including quality certification
documents for test sample materials, manufacturing process documents,
inspection records, test records, etc.), design service life, safe discharge
volume calculation, calculation of safety valve displacement, etc.;
3) Design instructions, including at least the basis for selecting design parameters,
selection of materials, selection of accessories, manufacturing technical
conditions, inspection requirements, etc.;
4) Installation, use, maintenance instructions, including at least the maximum
working pressure, maximum working temperature, designated use, installation
requirements, design service life, safety maintenance points, etc.
5.2.2.3 Responsibilities of the manufacturer:
a) The manufacturer shall manufacture according to the design drawings; if the
original design needs to be modified, a written document agreeing to the
modification shall be obtained from the original design organization, meanwhile
the modified parts shall be recorded in detail.
b) The manufacturer shall formulate a complete quality plan before batch
manufacturing of vessels, which at least includes manufacturing process control
points, inspection items, qualification indicators.
c) During the manufacturing process, the manufacturer shall ensure the stability of
the manufacturing process; conduct specific inspections and tests on the vessel in
accordance with this standard and drawings; issue an inspection report; be
responsible for the accuracy and completeness of the report; issue a product
certificate after passing the inspection.
d) The manufacturer shall keep the type test report and certificate of the vessel for
long-term reference; each batch of vessels it produces shall have at least the
following relevant technical documents for reference. The retention period of the
technical documents shall not be less than the design service life of the vessel,
and no less than five years:
1) Material quality certificate for pressure components;
2) General manufacturing process documents;
3) Welding process documents;
4) Inspection and test records during the manufacturing process and after
completion of the vessel;
5) Original design drawings and as-built drawings of the vessel.
5.2.2.4 Responsibilities of inspection agencies
The institutions and their supervisory inspectors that conduct supervisory inspections
of vessels, within the jurisdiction of TSG 21, shall perform corresponding work
responsibilities, in accordance with the provisions of the specifications during
supervisory inspections; they shall be responsible for the completeness and accuracy of
the inspection reports issued.
5.3 General provisions for design
5.3.1 Design methods are divided into calculation methods and test methods. The wall
thickness of the pressure components of the vessel is calculated according to the rules
of the corresponding chapter of GB 150.3. The wall thickness of the main pressure
components, such as the cylinder, convex head, flat cover, etc. of the vessel, is
determined by the bursting test using the physical vessel sample, as the test method.
Austenitic stainless steel vessels are not allowed to be designed using test methods.
5.3.2 The overall design drawing of the vessel shall indicate at least the following:
a) Name of the specification and standard based on;
b) Vessel name;
c) Design methods;
d) Material designation and material requirements of pressure components;
e) Design conditions, including design temperature, design pressure, working
pressure, design service life, medium, corrosion allowance, etc.;
f) Main characteristic parameters, including volume, weight, etc.;
g) Welding methods and requirements; the degree of mechanization of the welding
method of longitudinal butt joints of pressure components and the degree of
mechanization of the welding method of non-full-section penetration pipe seats
when designing the calculation method;
h) Anti-corrosion requirements (if necessary);
i) Pressure test requirements, including test pressure, medium, etc.;
6.3 The negative deviation of steel plate and steel pipe materials shall comply with the
provisions of the corresponding material standards.
6.4 The materials, usage conditions, allowable stress of non-welded parts such as studs
and nuts shall be in accordance with the provisions of the corresponding chapters of
GB 150.
6.5 The material of the permanent backing plate shall be the same or similar to the steel
designation of the weldment.
6.6 The welding materials used shall ensure that the performance of the welded joint
meets the design requirements.
7 Design
7.1 Design of wall thickness
7.1.1 Design of calculation method
7.1.1.1 The design pressure of the vessel shall not be lower than its working pressure.
7.1.1.2 For vessels equipped with safety valves, the design pressur...