BS 7122:1989
Current
The latest, up-to-date edition.
Specification for welded steel tanks for the road transport of liquefiable gases
Hardcopy , PDF
English
31-08-1989
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Foreword
Committees responsible
Specification
Section one. General
1. Scope
2. Definitions
3. Design, manufacture and testing of tanks
4. Information to be supplied by the purchaser and
the manufacturer
5. Certificate of acceptance
Section two. Materials
6. General
7. Identification
8. Condition
9. Analysis
10. Permissible materials
11. Impact and intercrystalline corrosion tests
Section three. Design
12. General
13. Welds
14. Valves and fittings
15. Pressure relief devices
Section four. Manufacture and workmanship
16. General
17. Tolerances
18. Post weld heat treatment
Section five. Inspection and tests
19. General
20. Production control test plates
21. Pressure tests
22. Water capacity
23. Marking
Appendices
A. Typical acceptance certificate
B. Side protection
Tables
1. Impact values
2. Intercrystalline corrosion test
3. Design stress values for austenitic steel bars
4. Design pressure for toxic gases in uninsulated tanks
5. Design pressure for non-toxic gases in uninsulated
tanks
6. Constant C for gas or vapour related to the ratio
of specific heat capacities (K = Cp/Cv) at
standard conditions
Figures
1. Location of side protection relative to the
horizontal centreline of the tank
2. Section of guard rail
Material, design, construction and testing. Tanks with manually and/or automatically welded circumferential and longitudinal seams. May also be used for portable tanks with capacity greater than 1000 L.
| Committee |
PVE/19
|
| DevelopmentNote |
Supersedes 82/70979 DC (09/2005) Reviewed and confirmed by BSI, December 2009. (11/2009)
|
| DocumentType |
Standard
|
| Pages |
20
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This British Standard specifies requirements for the material, design, construction and testing of the tanks of road tankers used for the conveyance by road of liquefiable gases under pressure. It applies to steel tanks having manually and/or automatically welded circumferential and longitudinal seams.
It does not cover vacuum insulated tanks and drums.
This standard may also be used as a specification for the materials, design, construction and testing of portable tanks (e.g. the tanks of tank containers) with a capacity greater than 1 000 L, in which case 12.6 and 12.7 do not apply.
In addition to the definitive requirements, this British Standard also requires the items detailed in clause 4 to be documented. For compliance with this British Standard, both the definitive requirements and the documented items have to be satisfied. A model form of acceptance certificate is given in Appendix A.
The requirements for design, manufacture and testing of tanks are based on those specified for construction category 1 components of BS 5500 and as far as possible are covered by direct cross-references to the relevant requirements in sections 2, 3, 4 and 5 of BS 5500, and to the requirements of other relevant British Standards.
NOTE The titles of the publications referred to in this standard are listed on the inside back cover.
| BS 1501-3:1973 | Specification for steels for fired and unfired pressure vessels. Plates. Corrosion and heat resisting steels. Imperial units |
| BS 4882:1973 | Specification for bolting for flanges and pressure containing purposes |
| BS 1501-2:1988 | Steels for pressure purposes Specification for alloy steels: plates |
| BS 1837:1970 | Methods for the sampling of iron, steel, permanent magnet alloys and ferro-alloys |
| BS 3602-1:1987 | Specification for steel pipes and tubes for pressure purposes: carbon and carbon manganese steel with specified elevated temperature properties Specification for seamless and electric resistance welded including induction welded tubes |
| BS 341-1:1962 | Transportable gas container valves Valves with taper stems (excluding valves used for breathing and medical purposes) |
| BS 1503:1989 | Specification for steel forgings for pressure purposes |
| BS 5500:1988 | Specification for unfired fusion welded pressure vessels |
| BS 5355:1976 | Specification for filling ratios and developed pressures for liquefiable and permanent gases |
| BS 4250-1:1987 | Liquefied petroleum gas Specification for commercial butane and propane |
| BS 3951-2.3(1983) : 1983 | FREIGHT CONTAINERS - SPECIFICATION AND TESTING OF SERIES 1 FREIGHT CONTAINERS - TANK CONTAINERS FOR LIQUID AND GASES |
| BS 4580:1970 | Specification for number designation of organic refrigerants |
| ISO 377:2017 | Steel and steel products — Location and preparation of samples and test pieces for mechanical testing |
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