| Document ID (ISN) | 25761 |
| CIS number |
76-1545 |
| ISBN(s) |
0-580-09230-5 |
| Year |
1976 |
| Convention or series no. |
|
| Title |
British standard specification: Access and inspection openings for pressure vessels. |
| Bibliographic information |
BS 470:1976, British Standards Institution, 2 Park Street, London W1A 2BS, United Kingdom, Feb. 1976. 4p. Illus. Price: £1.50. |
| Abstract |
This standard, prepared under the authority of the Pressure Vessel Industry Standards Committee, takes account of discussions concerning the international standardisation of pressure vessels. It specifies the requirements for the provision and dimensions of sighthole, handhole, headhole and manhole openings into static and mobile pressure vessels requiring inspection facilities. Definitions are followed by general requirements and sections devoted to: sizes of access and inspection openings; design considerations; minimum number of openings and their positions. Viewing ranges for sightholes, handholes and headholes are illustrated diagrammatically, and there is a table indicating minimum number and type of openings according to diameter of vessel. Section 30 of the Factories Act 1961 requires an opening of 460mm diameter; experiments carried out by the United Kingdom factory inspectorate indicate that this is a reasonable minimum for rescue by persons wearing airline breathing apparatus. It is not large enough for persons entering with self-contained breathing apparatus. |
| Descriptors (primary) |
United Kingdom; inspection openings; pressure vessels; manholes |
| Descriptors (secondary) |
standard; design of equipment |
| Document type |
F - Information notes, codes of practice, standards |
| Subject(s) |
Pressure vessels and systems
|
| Broad subject area(s) |
|
| Browse category(ies) |
Compressed gases and pressure vessels
Confined spaces
|
