NB/T 10355-2019_English: PDF (NB/T10355-2019)
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Tube skid container
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NB/T 10355-2019
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| Standard ID | NB/T 10355-2019 (NB/T10355-2019) | | Description (Translated English) | (Tube bundle container) | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | J74 | | Classification of International Standard | 23.020.01 | | Word Count Estimation | 35,365 | | Date of Issue | 2019 | | Date of Implementation | 2020-07-01 |
NB/T 10355-2019
NB
ENERGY INDUSTRY STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.020.01
J 74
Tube skid container
管束式集装箱
ISSUED ON: DECEMBER 30, 2019
IMPLEMENTED ON: JULY 01, 2020
Issued by: National Energy Administration
Table of Contents
Foreword ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 8
4 Qualifications and responsibilities ... 9
5 Materials ... 11
6 Design ... 16
7 Safety accessories, instruments, loading & unloading accessories ... 28
8 Manufacturing ... 33
9 Test methods ... 39
10 Inspection rules ... 43
11 Signs, markings ... 45
12 Exit-factory documents ... 46
13 Storage and transportation ... 47
Appendix A (Normative) Special technical requirements for compressed natural gas
cylinder containers ... 49
Appendix B (Normative) Risk assessment report ... 55
Appendix C (Normative) Wall thickness calculation of loading & unloading pipeline
... 57
Tube skid container
1 Scope
1.1 This standard specifies the materials, design, manufacturing, test methods,
inspection rules, marking, exit-factory documents, storage and transportation
requirements for tube skid containers.
1.2 This standard applies to tube skid containers, which are composed of the following
large-volume steel seamless gas cylinders (hereinafter referred to as gas cylinders)
connected to frames:
a) The operating ambient temperature is -40 °C ~ 60 °C;
b) The nominal working pressure of the gas cylinder is 10 MPa ~ 30 MPa; the
nominal working pressure of the gas cylinder used for filling oxygen shall not be
greater than 20 MPa;
c) The nominal water volume of the gas cylinder is 150 L ~ 4200 L;
d) The filling medium is natural gas, hydrogen, oxygen, air, nitrogen, argon, helium,
neon, krypton and other compressed gases.
1.3 This standard applies to road, railway, water transport and to tube skid containers
used for multimodal transport in these modes.
1.4 Gas cylinder containers, which have a nominal water volume of 150 L ~ 1000 L and
a sum of nominal water volumes of each group of gas cylinders not exceeding 3000 L,
shall also comply with the provisions of Appendix A.
1.5 This standard does not apply to the following tube skid containers:
a) Filled with liquefied gas, dissolved gas, extremely toxic medium;
b) The gas cylinder is a filament-wound gas cylinder.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
5.1.5 The material manufacturer shall provide the material quality certificate to the tube
skid container manufacturer. The content of the material quality certificate shall be
complete and clear; it shall be printed with a traceable information marking or label; it
shall have the quality inspection seal of the material manufacturer.
5.1.6 When the tube skid container manufacturer obtains materials from non-material
manufacturers, it shall obtain the original material quality certificate provided by the
material manufacturer OR a copy stamped with the official seal of the material business
organization and the signature (seal) of the responsible person.
5.1.7 The tube skid container manufacturer shall be responsible for the authenticity and
consistency of the materials and material quality certificates obtained.
5.1.8 When imported pressure piping components are used, they shall comply with the
requirements of corresponding safety technical specifications and standards. Pressure
piping components imported for the first time shall be type tested by a pressure piping
component type testing agency, which is approved by the State Administration for
Market Regulation.
5.2 Gas cylinder
5.2.1 Cylinder body
5.2.1.1 Seamless steel pipes for cylinders shall not only comply with the requirements
of TSG R0006 and GB/T 33145, but also comply with the requirements of this standard.
5.2.1.2 The cylinder body shall be made of a single seamless steel pipe; splicing is not
allowed.
5.2.1.3 For seamless steel pipes used to fill hydrogen or natural gas and other medium
that are prone to brittleness and stress corrosion, the chemical composition of the
material shall meet the following requirements: the content of carbon (C) is not more
than 0.350%, phosphorus (P) is not more than 0.020%, sulfur (S) is not more than
0.010%, the total content of sulfur and phosphorus (S + P) is not more than 0.025%.
5.2.1.4 Except for seamless steel pipes filled with medium other than those specified in
5.2.1.3, the chemical composition of the material shall meet the following requirements:
the content of carbon (C) is not more than 0.050%, phosphorus (P) is not more than
0.020%, sulfur (S) is not more than 0.010%, the total content of sulfur and phosphorus
(S + P) is not more than 0.025%.
5.2.1.5 The inner and outer surfaces of the steel pipe shall be free of defects such as
cracks, folds, roll folds, separation layers, scarring. If there are defects, they shall be
completely removed; the removed areas shall be smoothly transitioned; the actual wall
thickness after removal shall not be less than the specified value.
5.2.1.6 Steel pipes shall be subjected to longitudinal and transverse ultrasonic testing
one by one in accordance with the provisions of NB/T 47013.3-2015; the acceptance
quality level shall not be lower than level I.
5.2.2 End plug
5.2.2.1 The end plug shall be made of forgings. When selecting 30CrMo or 35CrMo
forgings, it shall comply with the requirements of NB/T 47008-2017; its level shall not
be lower than level III. When selecting austenitic stainless steel forgings such as S30408,
S30403, S31608, S31603, etc., it shall comply with the requirements of NB/T 47010-
2017; its level shall not be lower than level III.
5.2.2.2 The hardness of 30CrMo and 35CrMo forgings, after quenching and tempering
heat treatment, shall be lower than the hardness of the cylinder after heat treatment.
After -40 °C Charpy impact test, the average impact energy absorption (KV2) of its
three standard impact specimens is not less than 41J; the impact absorbed energy value
of one specimen is allowed to be less than 41J but not less than 29J.
5.3 Pipeline
5.3.1 Loading & unloading pipelines
5.3.1.1 The pipes shall be made of austenitic stainless steel seamless steel pipes, such
as S30403, S30408, S31603, S31608, etc.; meanwhile it shall comply with the
requirements of GB/T 14976. The hydrogen filling medium shall use austenitic stainless
steel seamless steel pipes, such as S31603 and S31608.
5.3.1.2 Pipe fittings shall be made of austenitic stainless steel forgings, such as S30403,
S30408, S31603, S31608, etc.; meanwhile it shall comply with the requirements of
NB/T 47010; the level shall not be lower than level III. The hydrogen filling medium
shall use austenitic stainless steel forgings, such as S31603 and S31608.
5.3.2 Sewage pipe
Sewage pipes should be made of austenitic stainless steel seamless steel pipes, such as
S30403, S30408, S31603, S31608, etc.; meanwhile it shall comply with the
requirements of GB/T 14976.
5.3.3 Discharge pipe
The discharge pipe shall be made of stainless steel pipes, such as S30403, S30408,
S31603, S31608, etc.; meanwhile it shall comply with relevant standards, such as GB/T
14976 or GB/T 12771.
5.3.4 Pneumatic pipeline
Pneumatic pipelines should be made of non-metallic materials that meet the usage
requirements; their nominal pressure shall not be less than 0.8 MPa; they shall meet the
inspection cycle of tube skid containers.
5.6.3 The sealing materials of end plugs and gas cylinders shall be made of non-metallic
materials and comply with the following requirements:
a) When filling natural gas, hydrogen, nitrogen, argon, helium, neon, krypton and
other medium, the O-ring shall be made of fluorine rubber, nitrile rubber or
EPDM rubber;
b) Flat gaskets should be made of polytetrafluoroethylene;
c) The retaining ring should be made of polytetrafluoroethylene.
5.6.4 Metal seals and non-metal seals can be used for sealing between pipelines and
valves, between pipelines and instruments. When filling natural gas, hydrogen, nitrogen,
argon, helium, neon, krypton and other medium, non-metal sealing materials shall be
nitrile rubber, butyl rubber, fluorine rubber, ethylene propylene rubber, polyurethane
rubber, chloroprene rubber, etc.
5.6.5 When filling hydrogen and helium, polytetrafluoroethylene material shall not be
used as the sealing material alone.
5.6.6 When filling oxygen and air, metal materials such as copper and copper alloy
should be used as sealing materials.
5.7 Welding materials
5.7.1 The selection of welding materials shall consider the matching of the mechanical
properties of the welded joint with the base metal; the tensile strength of the weld metal
shall not be lower than the lower limit specified in the base metal standard.
5.7.2 The welding materials used for pressure components shall comply with the
provisions of NB/T 47018.1 ~ NB/T 47018.4; it shall have clear and firm signs.
5.7.3 Welding materials for pressure components shall be subject to welding process
qualification according to the requirements of NB/T 47014. It can only be used after
passing the qualification.
5.7.4 The manufacturer shall establish and implement a system for the acceptance, re-
inspection, storage, drying, distribution, and recycling of welding materials.
5.8 Overseas materials and new materials
When selecting overseas designation materials or new materials for gas cylinders and
loading & unloading pipelines, they shall comply with the relevant requirements of
TSG R0005 and TSG R0006.
5.9 Others
5.9.1 Outsourced parts shall comply with the provisions of corresponding national
standards or industry standards; they shall have quality certification documents or
product certificates.
5.9.2 Corner fittings shall comply with the requirements of GB/T 1835. After Charpy
impact test at -40 °C, the average impact absorbed energy (KV2) of the three standard
impact specimens shall not be less than 21J; the impact absorbed energy of one
specimen is allowed to be less than 21J but not less than 15J.
5.9.3 Bolts and nuts used for connection, such as support end plates and connecting
flanges, shall be commercial grade or special grade fasteners. When commercial grade
carbon steel or low alloy steel is selected, the strength of bolts shall not be lower than
level 8.8; the strength of nuts shall not be lower than level 8.
5.9.4 Valves and instruments shall comply with the requirements of corresponding
standards.
6 Design
6.1 General requirements
6.1.1 In addition to complying with the requirements of this standard, the design of tube
skid containers shall also comply with relevant laws and regulations, safety technical
specifications, national standards, industry standards.
6.1.2 The structure of the tube skid container, the connection between the gas cylinder
and the frame, the arrangement of pipelines, safety accessories, instruments, loading &
unloading accessories shall be safe and reliable; meanwhile it shall meet the usage
requirements.
6.1.3 The same tube skid container shall use gas cylinders with the same material,
nominal working pressure, nominal diameter, nominal water capacity.
6.1.4 When designing tube skid containers, appropriate protective measures shall be
taken into consideration, to prevent damage caused by impact or overturning in the
longitudinal and transverse directions or leakage of the filling medium.
6.1.5 The design load endured by tube skid containers shall be determined through
calculation or testing.
6.1.6 Tube skid containers used in international multimodal transport shall comply with
the requirements of relevant international conventions.
6.1.7 For tube skid containers used for railway transportation, the structural strength
and stiffness of the prototype container shall be able to withstand the impact force of
not less than 4 times the rated mass, which is multiplied by the acceleration of gravity
b) Calculation of cylinder volume;
c) Calculation of the maximum filling capacity of gas cylinders;
d) Verification and calculation of bending stress of gas cylinders;
e) Verification and calculation of bending stress of gas cylinders under dynamic load;
f) Calculation of cylinder deflection under dynamic load;
g) Verification and calculation of end plug thread strength;
h) Calculation of the safety relief capacity of gas cylinders and the relief area of
overpressure relief devices:
i) Strength calculation of loading & unloading pipelines;
j) Calculation of pipeline safety valve discharge (when necessary);
k) Frame stress analysis and calculation;
1) Calculation of the structural strength of tie rods, support end plates, connecting
flanges using bolts or frames under inertial force loads.
6.2.5 Design drawings, including at least general design drawings, gas cylinder
drawings, piping system drawings, necessary parts drawings, etc.
6.2.5.1 The general design drawing shall at least indicate the following:
a) Product name, model, main safety technical specifications and product standards
that shall be followed in design and manufacturing;
b) Applicable modes of transportation, including railways, roadways, waterways or
combined transportation of these modes of transportation, etc.:
c) Main working conditions, including working environment temperature, etc.;
d) Main design parameters, including nominal working pressure of gas cylinders,
design temperature, design pressure, minimum design metal temperature of
loading & unloading pipelines, etc.;
e) Filling medium, including the medium number (UN number or CAS number),
name, category (item), hazards, medium standard. If necessary, it shall also
indicate the quality grade, components, harmful impurity content, etc., of the
medium;
f) Main technical characteristics parameters, including rated mass, empty container
mass, filling mass, nominal working pressure of the gas cylinder, nominal water
volume of a single gas cylinder, total water volume, etc.;
g) The design service life of the gas cylinder (indicate the number of fatigue cycles
of the gas cylinder if necessary);
h) Non-destructive testing requirements for loading & unloading pipelines;
i) Gas cylinder's water pressure test requirements, pipeline pressure resistance test
requirements, overall leakage test requirements;
j) Internal and external surface treatment and coating requirements of gas cylinders;
k) Special manufacturing requirements, such as nitrogen or inert gas replacement
requirements, etc.;
1) Models, specifications, performance parameters, connection methods of safety
accessories, instruments, loading & unloading accessories, etc.;
m) The location of product nameplates and electronic nameplates;
n) Loading & unloading port orientation, specifications, connection methods;
o) Painting and marking and labeling requirements;
p) Other relevant requirements stipulated in the regulations or normative documents
of the industry authorities of the State Council, such as railways, highways or
waterways.
6.2.5.2 The gas cylinder diagram shall at least include the following contents:
a) Design document identification number of gas cylinder;
b) Main safety technical specifications and standards;
c) Gas cylinder body material, cylinder body design wall thickness, cylinder body
size, cylinder mouth thread specifications and dimensions, etc.;
d) Technical characteristics table, chemical composition of cylinder materials,
mechanical properties of cylinder materials after heat treatment, etc.;
e) Non-destructive testing, heat treatment, pressure resistance test, internal and
external surface treatment requirements of gas cylinders, etc.;
f) Steel stamp mark (including manufacturer code);
g) Design service life (indicate the number of fatigue cycles of cylinder if necessary).
6.2.5.3 The piping system diagram shall include at least the following contents:
6.3.1 The external dimensions and tolerances of tube skid containers shall comply with
the provisions of GB/T 1413; the height can be reduced according to the arrangement
of gas cylinders. When the external dimensions of tube skid containers exceed those
specified in GB/T 1413 (such as over-length, over-width, etc.), they shall be designed,
manufactured, inspected, accepted in accordance with the standards recognized by the
industry authorities of the State Council; it shall be marked accordingly.
6.3.2 Any part of the tube skid container and various accessories shall not exceed the
specified external dimensions.
6.3.3 The rated mass of tube skid containers shall comply with the provisions of GB/T
1413. When the rated mass exceeds the value specified in GB/T 1413, in addition to
being designed, inspected, tested, marked according to the rated mass value, it shall
also apply an overweight mark.
6.4 Medium
6.4.1 The classification, product name, number of the medium shall comply with the
provisions of GB 6944 and GB 12268. The medium shall also comply with the
provisions of the corresponding standards.
6.4.2 Natural gas shall comply with the following requirements:
a) Compressed natural gas for vehicles shall comply with the requirements of GB
18047;
b) Commercial natural gas shall comply with the provisions of category I and
category II natural gas in GB 17820-2012.
6.4.3 Hydrogen shall comply with the provisions of GB/T 3634 (all parts). The
hydrogen used in fuel cell vehicles shall comply with the provisions of the
corresponding standards.
6.5 Load
6.5.1 The following loads shall be considered when designing tube skid containers:
a) Internal pressure OR maximum internal and external pressure difference;
b) Dynamic loads including inertial force loads during transportation;
c) The pressure load of the filling medium under its own weight, normal operation
or inspection test conditions;
d) Forces during transportation or lifting;
e) The force exerted on connecting pipelines and other components;
f) Force caused by temperature gradient or thermal expansion;
g) Pressure during filling or unloading;
h) When the gas cylinder is connected to the support end plate and the hoop, the
force of the support end plate, tie rod, pull strap or hoop and other supports or
connectors;
i) Load during type test.
6.5.2 The inertial force load, which is endured by tube skid containers during
transportation conditions, shall be converted into equivalent static force according to
the following requirements:
a) Movement direction: 2 times the maximum mass multiplied by the acceleration
of gravity;
b) Horizontal direction perpendicular to the direction of movement: The maximum
mass times the acceleration of gravity (when the direction of movement is unclear,
it is 2 times the maximum mass multiplied by the acceleration of gravity);
c) Vertically upward: Maximum mass multiplied by acceleration of gravity;
d) Vertically downward: 2 times the maximum mass multiplied by the acceleration
of gravity.
Note 1: When calculating the inertial force load, which is endured by the gas cylinder during
transportation, the maximum mass is the maximum allowable filling volume of the medium.
Note 2: When calculating the inertial force load, which is borne by the connection between the
gas cylinder and the frame during transportation, the maximum mass is the sum of the maximum
allowable filling volume of the medium, the mass of the gas cylinder and accessories.
6.6 Design of frames, lifting, fastenings
6.6.1 The strength and stiffness of the frame shall meet the requirements of type test.
6.6.2 The design of the frame shall consider the corrosion effect of the external
environment.
6.6.3 The design of the frame, support end plates, hoops, lifting and fastening parts shall
avoid undue stress concentration on any part of the tube skid container.
6.6.4 Tube skid containers shall not be equipped with fork grooves.
6.6.5 Tube skid containers shall be equipped with permanent lifting and securing
components on the frame.
top, as relative to the bottom, shall not exceed 25 mm.
6.6.14 Optional facilities, such as walkways and ladders, for tube skid containers shall
comply with the following requirements:
a) The design of the walkway shall be able to withstand a uniform load of 3 kN on
an area of 600 mm × 300 mm; the minimum width of the longitudinal walkway
is 400 mm;
b) The ladder is designed so that each step can withstand a load of 2 kN.
6.7 Structural design
6.7.1 The connection between the gas cylinder and any other parts is not allowed to use
a welded structure; reliable measures shall be taken to prevent circumferential rotation
and axial movement of the gas cylinder, during transportation and use.
6.7.2 The gas cylinder’s support end plates, tie rods, straps or hoops and other
connecting parts shall have sufficient stiffness and strength; the possible effects of
thermal expansion and contraction of the gas cylinder shall be taken into account.
6.7.3 There shall be sufficient clearance between gas cylinders; protective shock-
absorbing measures shall be provided if necessary.
6.7.4 Tube skid containers shall be equipped with support end plates, at appropriate
positions at both ends, to support and fix gas cylinders.
6.7.5 An operating compartment shall be installed at the rear end of the tube skid
container. The pipelines, instruments, loading & unloading accessories in the operating
compartment shall be arranged for easy use. When filling flammable and explosive
medium such as compressed natural gas and hydrogen, buffer strips shall be installed
on the compartment operating door.
6.7.6 If necessary, a safety chamber may be installed at the front end of the tube skid
container, for accommodation of overpressure relief devices or backup.
6.7.7 After the gas cylinder is assembled, its longitudinal center plane and the
longitudinal plane of the frame shall coincide, which has an allowable deviation of ±6
mm.
6.7.8 Corresponding protective measures shall be taken for tube skid containers, to
prevent damage to gas cylinders and accessories, which is caused by horizontal and
vertical impacts and overturning during transportation.
6.7.9 The design of the loading & unloading system shall ensure that each gas cylinder
can be loaded and unloaded independently. The loading & unloading system of gas
cylinders consists of at least three independent devices connected in series. The first is
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