NB/T 47058-2017 PDF English
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NB
ENERGY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.160
T 58
Replacing JB/T 4783-2007
Road tankers for refrigerated liquefied gas
Issued on. NOVEMBER 15, 2017
Implemented on. MARCH 01, 2018
Issued by. National Energy Administration
Announcement of National Energy Administration
No. 10, 2017
Table of Contents
Foreword... 4
1 Scope... 7
2 Normative references... 8
3 Terms and definitions... 11
4 Qualification and responsibilities... 13
5 Materials... 15
6 Design... 22
7 Safety accessories, instruments and loading-unloading accessories... 44
8 Manufacturing... 53
9 Test methods... 74
10 Inspection rules... 79
11 Marks, logos... 82
12 Exit-factory documents... 82
13 Storage, transportation... 84
Annex A (normative) Declaration of conformity to the standard and amendments... 86
Annex B (normative) Risk assessment report... 88
Annex C (normative) Calculation of the safe discharge capacity of the tank and the
discharge capacity of the overpressure relief device... 90
Bibliography... 104
1 Scope
1.1 This Standard specifies the requirements for materials, design, manufacture, test
methods, inspection rules, signs and marks, exit-factory documents, storage and
transportation for road tankers for refrigerated liquefied gas (hereinafter referred to as
tankers).
1.2 This Standard is applicable to the tanker of which the design pressure of the
container in the tank is not less than 0.1 MPa, the geometric volume is not less than 1
m3, the vacuum powder insulation or high vacuum multi-layer insulation structure is
adopted, and the tank is permanently connected to the finalized chassis or semi-trailer
running mechanism.
1.3 This Standard does not apply to tankers in the following ranges.
a) The material of the tank is non-ferrous metal or non-metal;
b) Tankers filled with refrigerated liquefied gas medium with standard boiling point
lower than -196°C;
c) Tankers filled with toxic medium;
d) Tankers with special requirements for national defense and military equipment.
1.4 Defined scope
1.4.1 The scope of tankers to which this Standard applies includes tank bodies, pipelines,
safety accessories, instruments, loading-unloading accessories, and finalized chassis or
semi-trailer running gears, supports, operation boxes, self-superchargers, etc.
1.4.2 The scope of tankers is defined as follows.
a) The beveled end face of the first circumferential joint of the welded connection
between the tank and the pipeline;
b) The first threaded joint end face of the tank and the pipeline and safety accessories
threaded connection, and the first flange sealing surface of the flange connection;
c) The end cover of the opening part of the tank and its fasteners;
d) The connection welds between the tank and non-pressure components.
1.4.3 Pipeline includes all pipes and fittings connected to the tank.
1.4.4 The main pressure components include the cylinder body and head of the inner
container, the pipes and pipe sockets with a nominal diameter of not less than 15 mm
in contact with the filling medium, flanges, flange covers, etc.
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 150.1, Pressure vessels -- Part 1.General requirements
GB/T 150.2, Pressure vessels -- Part 2.Materials
GB/T 150.3-2011, Pressure vessels -- Part 3.Design
GB/T 150.4-2011, Pressure Vessels -- Part 4.Fabrication, inspection and testing,
and acceptance
GB/T 567.1, Bursting disc safety devices -- Part 1.Basic requirement
GB/T 567.2, Bursting disc safety devices -- Part 2.Application, selection and
installation
GB/T 567.3, Bursting disc safety devices -- Part 3.Classification and mounting
dimensions
GB/T 713, Steel plates for boilers and pressure vessels
GB 1589, Limits of dimensions, axle load and masses for motor vehicles, trailers
and combination vehicles
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 150.1,
GB/T 150.4, GB/T 3730.2, GB/T 3730.3, GB/T 18443 and GB/T 26929 as well as the
followings apply.
3.1 refrigerated liquefied gas
A gas which is partly liquid due to low temperature during transport. The critical
temperature is generally not higher than -50°C.
3.7 geometric volume
The internal volume of the inner container determined according to the designed
geometric dimensions, minus the volume occupied by the internal parts.
3.8 effective volume
In the state of use, the maximum volume of refrigerated liquefied gas allowed by the
inner container.
3.9 equivalent pressure
The pressure that the tank is subjected to under normal transport conditions due to the
action of the inertial force load of the medium.
3.10 filling rate
The ratio of the liquid volume of the tanker filled with refrigerated liquefied gas to the
geometric volume of the inner container.
4 Qualification and responsibilities
4.1 Qualification
4.1.1 The design, manufacture, inspection and acceptance of tankers shall not only
comply with the provisions of this Standard, but also comply with the relevant laws,
regulations and safety technical specifications promulgated by the state.
4.2 Responsibilities
4.2.1 User or design client
The user or the design client shall submit the tanker design conditions to the design unit
in formal written form. Design conditions include at least the following.
4.2.2 Designer
4.2.2.1 The designer shall complete the vehicle design based on the contents of the risk
assessment report, and shall be responsible for the correctness and completeness of the
design documents.
4.2.2.2 The management and use of the special seal for design shall meet the
requirements of TSG R0005.
4.2.2.3 The designer shall keep all the design documents within the design service life
of the tanker.
4.2.3 Manufacturer
4.2.3.7 The tanker shall pass the type test and related tests of the testing agency
approved by the competent department or the approved test agency according to the
model, and obtain the corresponding qualification certificates.
4.2.3.8 The manufacturer shall keep at least the following technical documents for
reference within the design service life of each tanker it manufactures.
5 Materials
5.1 General requirements
5.1.1 The selection of materials shall consider the mechanical properties, physical
properties, process properties and compatibility with the medium of the material.
5.1.2 For materials that may be in contact with oxygen or an oxygen-enriched
environment, their compatibility with oxygen shall comply with the provisions of GB/T
31481.
5.2 Tank material
5.2.1 The material selected for the tank shall comply with the provisions of GB/T 150.2
and the corresponding national standards and industry standards. When selecting
materials for tank pressure components, the use conditions of materials (such as design
temperature, design pressure, medium characteristics and operating characteristics,
etc.), material properties (mechanical properties, process properties, chemical
properties and physical properties), tank manufacturing process and economic
rationality shall be considered.
5.2.2 The use of foreign brand materials or new materials shall comply with the relevant
regulations of TSG R0005.
5.2.3 Inner container
5.2.4 Shell
5.2.4.1 Smelting method
5.2.4.1.1 The steel used for the shell shall be killed steel.
5.2.4.1.2 The low-temperature steel plates and low-temperature steel forgings whose
design temperature is below -20°C shall also adopt the external refining process.
5.2.4.2 Chemical composition (melting analysis)
5.2.4.2.1 For low-alloy steel materials used for welding, the carbon content is not
greater than 0.250%, the phosphorus content is not greater than 0.035%, and the sulfur
content is not greater than 0.035%.
5.2.4.2.2 For low-alloy steel products (steel plates and steel forgings), the phosphorus
and sulfur content shall meet the following requirements.
5.2.4.3 Mechanical properties
5.2.4.3.1 For the low-alloy steel used for the shell, the standard value of the yield
strength at room temperature shall not exceed 460 MPa, and the standard value of the
upper limit of the tensile strength shall not exceed 725 MPa. It shall be able to adapt to
the environmental conditions encountered by the tanker during transportation and use.
It shall meet the requirements of the design drawings.
6 Design
6.1 General requirements
6.1.1 In addition to the requirements of this Standard, the design of the tanker shall also
comply with the relevant regulations, safety technical specifications, national standards
and industry standards. The layout of tank bodies, pipelines, safety accessories,
instruments and loading-unloading accessories shall meet the requirements of use and
safety.
6.4 Connection between tank and semi-trailer running gear
6.4.1 Semi-trailers can be divided into two types. semi-load-bearing and load-bearing
according to the stress on the tank and the connection method.
6.4.2 The semi-trailer frame shall be checked for structural strength.
6.4.3 The tank structure design of the load-bearing semi-trailer shall meet the
requirements of GB/T 23336.The tank shall be checked for strength under additional
gravity load.
6.4.4 The longitudinal center plane of the tank shall coincide with the longitudinal
center plane of the semi-trailer running gear. Its allowable deviation is not greater than
6 mm.
6.5 Tank design
6.5.1 General requirements
6.5.1.1 Tanks shall be designed based on possible failure modes.
6.5.5 Design pressure
6.5.5.1 The design pressure of the inner container shall be determined according to the
following provisions.
6.5.6.3 The equivalent pressure shall not be less than the maximum value obtained by
dividing the inertia force of the medium in each direction specified in 6.5.2.4 by the
effective cross-sectional area of the inner container in the corresponding direction, and
shall not be less than 0.035 MPa.
6.5.7 Coefficient of welded joints
6.5.7.1 The welding joint coefficient of the inner container is to be 1.0.
6.5.7.2 The welding joint coefficient of the shell is taken as 0.85.
6.5.8 Allowable stress
7 Safety accessories, instruments and loading-unloading accessories
7.1 General requirements
7.1.1 The installation of safety accessories, instruments and loading-unloading
accessories of tankers shall not only comply with the provisions of this Standard, but
also meet the requirements of the design documents.
7.1.9 Before the safety valve, pressure gauge and tank are assembled, they shall be
debugged and verified. They shall be re-sealed after passing the test.
7.1.10 The connection between safety accessories, instruments and pipelines can be
welded, flanged or threaded.
7.1.11 The connection between the loading-unloading accessories and the pipeline shall
be welded or flanged as much as possible.
7.1.12 When there is relative movement between accessories, necessary supporting or
fastening devices shall be provided.
7.2 Overpressure relief device for inner container
7.2.1 Setting of overpressure relief device for inner container
7.3 Shell explosion-proof device
7.3.1 The setting of shell explosion-proof device shall meet the following requirements.
7.3.2 The discharge area of the outer shell explosion-proof device is generally not less
than the product of the geometric volume of the inner container (m3) and 340 mm2/m3,
and may not be greater than 5000 mm2.
7.4 Emergency shut-off device
7.4.1 The emergency shut-off device generally consists of a slam-shut valve, a remote-
control system, and a fusible alloy plug. The emergency cut-off device shall be flexible
in action, reliable in performance, easy to overhaul, and shall not be used for other
purposes.
7.4.2 The emergency shut-off device shall pass the pressure test and air tightness test.
7.7.2.5 The loading-unloading hoses and quick connectors shall have sufficient
toughness at the lowest operating temperature.
7.7.2.6 After the loading-unloading hoses and quick connectors are assembled, the
pressure test and air tightness test shall be carried out one by one. The pressure of the
pressure test is 1.5 times the nominal pressure of the loading-unloading hose. The
airtightness test pressure is the nominal pressure of the loading-unloading hose.
7.7.2.7 The resistance of loading-unloading hoses for flammable and explosive medium
and liquid oxygen shall be less than 4 Ω.
7.7.2.8 The design service life of the hose shall be indicated when loading-unloading
the hose.
8 Manufacturing
8.1 General requirements
8.1.1 The tanker shall be manufactured and inspected according to the design
documents approved by the prescribed procedures and the requirements of this Standard.
8.1.2 When the finalized chassis or walking mechanism, tank pressure components
(heads, forgings, etc.)
8.1.4 The non-destructive testing of tanks shall be carried out by personnel who hold
the "Special Equipment Inspection and Testing Personnel Certificate (for Non-
destructive Testing Personnel)" of the corresponding item and are within the validity
period.
8.1.5 It shall not be forcefully assembled during manufacturing.
8.1.6 The manufacturer shall establish and strictly implement the welding material
acceptance, re-inspection, storage, drying, distribution and recycling systems.
8.1.7 The outline dimensions of the tanker shall comply with the requirements of the
design drawings.
8.2 Tank truck
8.2.1 The finalized chassis shall be inspected for storage, and shall at least include the
following contents.
8.3 Semi-trailer
8.3.1 The semi-trailer traveling mechanism shall be inspected for storage. The
inspection shall at least include the following.
8.3.2 The vertical tolerance of the axle of the semi-trailer to the longitudinal center
plane of the frame in the horizontal direction shall not be greater than 6 mm.
8.3.3 The rated pressure of the semi-trailer air storage tank shall comply with the
provisions of GB 7258.
9 Test methods
9.1 Test sequence
9.1.1 After the structural strength test of the tanker is completed, the low temperature
performance test can be carried out.
9.2 Pressure proof test
9.2.1 After the inner container is manufactured, it shall carry out the pressure proof test
according to the requirements of the drawings. Pressure proof test includes hydraulic
pressure test and air pressure test.
9.2.5 Basic requirements for pressure proof test
9.2.5.1 Continuous pressurization shall not be used to maintain the test pressure during
the pressure holding period. During the pressure test, the bolts shall not be tightened
under pressure or external force shall be applied to the pressure components.
9.2.6 Hydraulic pressure test
9.2.6.1 The medium of hydraulic pressure test is generally water. Other liquids which
do not present a hazard can also be used if necessary. During the test, the temperature
of the liquid shall be lower than its flash point or boiling point. Reliable safety measures
shall be taken.
9.2.6.2 The temperature of the hydraulic pressure test shall comply with the provisions
of GB/T 150.4 and design drawings.
9.2.6.3 The hydraulic pressure test shall meet the following requirements.
9.2.7 Air pressure test
9.2.7.1 Due to reasons such as structure or support, medium, etc., tanks with residual
test liquid are not allowed. Usually, a pneumatic test is used.
9.2.7.2 The gas used in the test shall be dry and clean air, nitrogen or other inert gases.
9.2.7.3 Air pressure test shall have safety protection measures. During the test, the
safety management department of the testing institution shall send personnel to conduct
on-site supervision.
NB/T 47058-2017
NB
ENERGY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.160
T 58
Replacing JB/T 4783-2007
Road tankers for refrigerated liquefied gas
Issued on. NOVEMBER 15, 2017
Implemented on. MARCH 01, 2018
Issued by. National Energy Administration
Announcement of National Energy Administration
No. 10, 2017
Table of Contents
Foreword... 4
1 Scope... 7
2 Normative references... 8
3 Terms and definitions... 11
4 Qualification and responsibilities... 13
5 Materials... 15
6 Design... 22
7 Safety accessories, instruments and loading-unloading accessories... 44
8 Manufacturing... 53
9 Test methods... 74
10 Inspection rules... 79
11 Marks, logos... 82
12 Exit-factory documents... 82
13 Storage, transportation... 84
Annex A (normative) Declaration of conformity to the standard and amendments... 86
Annex B (normative) Risk assessment report... 88
Annex C (normative) Calculation of the safe discharge capacity of the tank and the
discharge capacity of the overpressure relief device... 90
Bibliography... 104
1 Scope
1.1 This Standard specifies the requirements for materials, design, manufacture, test
methods, inspection rules, signs and marks, exit-factory documents, storage and
transportation for road tankers for refrigerated liquefied gas (hereinafter referred to as
tankers).
1.2 This Standard is applicable to the tanker of which the design pressure of the
container in the tank is not less than 0.1 MPa, the geometric volume is not less than 1
m3, the vacuum powder insulation or high vacuum multi-layer insulation structure is
adopted, and the tank is permanently connected to the finalized chassis or semi-trailer
running mechanism.
1.3 This Standard does not apply to tankers in the following ranges.
a) The material of the tank is non-ferrous metal or non-metal;
b) Tankers filled with refrigerated liquefied gas medium with standard boiling point
lower than -196°C;
c) Tankers filled with toxic medium;
d) Tankers with special requirements for national defense and military equipment.
1.4 Defined scope
1.4.1 The scope of tankers to which this Standard applies includes tank bodies, pipelines,
safety accessories, instruments, loading-unloading accessories, and finalized chassis or
semi-trailer running gears, supports, operation boxes, self-superchargers, etc.
1.4.2 The scope of tankers is defined as follows.
a) The beveled end face of the first circumferential joint of the welded connection
between the tank and the pipeline;
b) The first threaded joint end face of the tank and the pipeline and safety accessories
threaded connection, and the first flange sealing surface of the flange connection;
c) The end cover of the opening part of the tank and its fasteners;
d) The connection welds between the tank and non-pressure components.
1.4.3 Pipeline includes all pipes and fittings connected to the tank.
1.4.4 The main pressure components include the cylinder body and head of the inner
container, the pipes and pipe sockets with a nominal diameter of not less than 15 mm
in contact with the filling medium, flanges, flange covers, etc.
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 150.1, Pressure vessels -- Part 1.General requirements
GB/T 150.2, Pressure vessels -- Part 2.Materials
GB/T 150.3-2011, Pressure vessels -- Part 3.Design
GB/T 150.4-2011, Pressure Vessels -- Part 4.Fabrication, inspection and testing,
and acceptance
GB/T 567.1, Bursting disc safety devices -- Part 1.Basic requirement
GB/T 567.2, Bursting disc safety devices -- Part 2.Application, selection and
installation
GB/T 567.3, Bursting disc safety devices -- Part 3.Classification and mounting
dimensions
GB/T 713, Steel plates for boilers and pressure vessels
GB 1589, Limits of dimensions, axle load and masses for motor vehicles, trailers
and combination vehicles
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 150.1,
GB/T 150.4, GB/T 3730.2, GB/T 3730.3, GB/T 18443 and GB/T 26929 as well as the
followings apply.
3.1 refrigerated liquefied gas
A gas which is partly liquid due to low temperature during transport. The critical
temperature is generally not higher than -50°C.
3.7 geometric volume
The internal volume of the inner container determined according to the designed
geometric dimensions, minus the volume occupied by the internal parts.
3.8 effective volume
In the state of use, the maximum volume of refrigerated liquefied gas allowed by the
inner container.
3.9 equivalent pressure
The pressure that the tank is subjected to under normal transport conditions due to the
action of the inertial force load of the medium.
3.10 filling rate
The ratio of the liquid volume of the tanker filled with refrigerated liquefied gas to the
geometric volume of the inner container.
4 Qualification and responsibilities
4.1 Qualification
4.1.1 The design, manufacture, inspection and acceptance of tankers shall not only
comply with the provisions of this Standard, but also comply with the relevant laws,
regulations and safety technical specifications promulgated by the state.
4.2 Responsibilities
4.2.1 User or design client
The user or the design client shall submit the tanker design conditions to the design unit
in formal written form. Design conditions include at least the following.
4.2.2 Designer
4.2.2.1 The designer shall complete the vehicle design based on the contents of the risk
assessment report, and shall be responsible for the correctness and completeness of the
design documents.
4.2.2.2 The management and use of the special seal for design shall meet the
requirements of TSG R0005.
4.2.2.3 The designer shall keep all the design documents within the design service life
of the tanker.
4.2.3 Manufacturer
4.2.3.7 The tanker shall pass the type test and related tests of the testing agency
approved by the competent department or the approved test agency according to the
model, and obtain the corresponding qualification certificates.
4.2.3.8 The manufacturer shall keep at least the following technical documents for
reference within the design service life of each tanker it manufactures.
5 Materials
5.1 General requirements
5.1.1 The selection of materials shall consider the mechanical properties, physical
properties, process properties and compatibility with the medium of the material.
5.1.2 For materials that may be in contact with oxygen or an oxygen-enriched
environment, their compatibility with oxygen shall comply with the provisions of GB/T
31481.
5.2 Tank material
5.2.1 The material selected for the tank shall comply with the provisions of GB/T 150.2
and the corresponding national standards and industry standards. When selecting
materials for tank pressure components, the use conditions of materials (such as design
temperature, design pressure, medium characteristics and operating characteristics,
etc.), material properties (mechanical properties, process properties, chemical
properties and physical properties), tank manufacturing process and economic
rationality shall be considered.
5.2.2 The use of foreign brand materials or new materials shall comply with the relevant
regulations of TSG R0005.
5.2.3 Inner container
5.2.4 Shell
5.2.4.1 Smelting method
5.2.4.1.1 The steel used for the shell shall be killed steel.
5.2.4.1.2 The low-temperature steel plates and low-temperature steel forgings whose
design temperature is below -20°C shall also adopt the external refining process.
5.2.4.2 Chemical composition (melting analysis)
5.2.4.2.1 For low-alloy steel materials used for welding, the carbon content is not
greater than 0.250%, the phosphorus content is not greater than 0.035%, and the sulfur
content is not greater than 0.035%.
5.2.4.2.2 For low-alloy steel products (steel plates and steel forgings), the phosphorus
and sulfur content shall meet the following requirements.
5.2.4.3 Mechanical properties
5.2.4.3.1 For the low-alloy steel used for the shell, the standard value of the yield
strength at room temperature shall not exceed 460 MPa, and the standard value of the
upper limit of the tensile strength shall not exceed 725 MPa. It shall be able to adapt to
the environmental conditions encountered by the tanker during transportation and use.
It shall meet the requirements of the design drawings.
6 Design
6.1 General requirements
6.1.1 In addition to the requirements of this Standard, the design of the tanker shall also
comply with the relevant regulations, safety technical specifications, national standards
and industry standards. The layout of tank bodies, pipelines, safety accessories,
instruments and loading-unloading accessories shall meet the requirements of use and
safety.
6.4 Connection between tank and semi-trailer running gear
6.4.1 Semi-trailers can be divided into two types. semi-load-bearing and load-bearing
according to the stress on the tank and the connection method.
6.4.2 The semi-trailer frame shall be checked for structural strength.
6.4.3 The tank structure design of the load-bearing semi-trailer shall meet the
requirements of GB/T 23336.The tank shall be checked for strength under additional
gravity load.
6.4.4 The longitudinal center plane of the tank shall coincide with the longitudinal
center plane of the semi-trailer running gear. Its allowable deviation is not greater than
6 mm.
6.5 Tank design
6.5.1 General requirements
6.5.1.1 Tanks shall be designed based on possible failure modes.
6.5.5 Design pressure
6.5.5.1 The design pressure of the inner container shall be determined according to the
following provisions.
6.5.6.3 The equivalent pressure shall not be less than the maximum value obtained by
dividing the inertia force of the medium in each direction specified in 6.5.2.4 by the
effective cross-sectional area of the inner container in the corresponding direction, and
shall not be less than 0.035 MPa.
6.5.7 Coefficient of welded joints
6.5.7.1 The welding joint coefficient of the inner container is to be 1.0.
6.5.7.2 The welding joint coefficient of the shell is taken as 0.85.
6.5.8 Allowable stress
7 Safety accessories, instruments and loading-unloading accessories
7.1 General requirements
7.1.1 The installation of safety accessories, instruments and loading-unloading
accessories of tankers shall not only comply with the provisions of this Standard, but
also meet the requirements of the design documents.
7.1.9 Before the safety valve, pressure gauge and tank are assembled, they shall be
debugged and verified. They shall be re-sealed after passing the test.
7.1.10 The connection between safety accessories, instruments and pipelines can be
welded, flanged or threaded.
7.1.11 The connection between the loading-unloading accessories and the pipeline shall
be welded or flanged as much as possible.
7.1.12 When there is relative movement between accessories, necessary supporting or
fastening devices shall be provided.
7.2 Overpressure relief device for inner container
7.2.1 Setting of overpressure relief device for inner container
7.3 Shell explosion-proof device
7.3.1 The setting of shell explosion-proof device shall meet the following requirements.
7.3.2 The discharge area of the outer shell explosion-proof device is generally not less
than the product of the geometric volume of the inner container (m3) and 340 mm2/m3,
and may not be greater than 5000 mm2.
7.4 Emergency shut-off device
7.4.1 The emergency shut-off device generally consists of a slam-shut valve, a remote-
control system, and a fusible alloy plug. The emergency cut-off device shall be flexible
in action, reliable in performance, easy to overhaul, and shall not be used for other
purposes.
7.4.2 The emergency shut-off device shall pass the pressure test and air tightness test.
7.7.2.5 The loading-unloading hoses and quick connectors shall have sufficient
toughness at the lowest operating temperature.
7.7.2.6 After the loading-unloading hoses and quick connectors are assembled, the
pressure test and air tightness test shall be carried out one by one. The pressure of the
pressure test is 1.5 times the nominal pressure of the loading-unloading hose. The
airtightness test pressure is the nominal pressure of the loading-unloading hose.
7.7.2.7 The resistance of loading-unloading hoses for flammable and explosive medium
and liquid oxygen shall be less than 4 Ω.
7.7.2.8 The design service life of the hose shall be indicated when loading-unloading
the hose.
8 Manufacturing
8.1 General requirements
8.1.1 The tanker shall be manufactured and inspected according to the design
documents approved by the prescribed procedures and the requirements of this Standard.
8.1.2 When the finalized chassis or walking mechanism, tank pressure components
(heads, forgings, etc.)
8.1.4 The non-destructive testing of tanks shall be carried out by personnel who hold
the "Special Equipment Inspection and Testing Personnel Certificate (for Non-
destructive Testing Personnel)" of the corresponding item and are within the validity
period.
8.1.5 It shall not be forcefully assembled during manufacturing.
8.1.6 The manufacturer shall estab......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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