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BS 341-1:2022 - TC Tracked Changes. Gas cylinders. Cylinder valves - Threads for connection of valves to gas cylinders. Specification, 2022
- 30437020-WEB.pdf [Go to Page]
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- Figure 1 — Hand wheel operated valve
- Figure 2 — Key operated valve
- 4 General requirements [Go to Page]
- 4.1 Spindle ends for key operated valves
- 4.2 Use of pressure relief devices
- 5 Valve inlet and cylinder neck connections [Go to Page]
- 5.1 Tapered
- 5.2 Oversized tapered
- 5.3 Parallel
- Figure 3 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 16T Type
- Table 1 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 16T Type
- Figure 4 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 17T Type
- Table 2 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 17T Type
- Figure 5 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 18T Type
- Table 3 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 18T Type
- Figure 6 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 19T Type
- Table 4 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 19T Type
- Figure 7 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 26T Type
- Table 5 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 26T Type
- Figure 8 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 32T Type
- Table 6 — Dimensions and manufacturing tolerances of valve body tapered stem/cylinder neck threads – 32T Type
- 6 Inspection gauges
- 7 Marking
- Annex A (informative) Comparison between valve tapered inlet connections in this British Standard and the nominal sizes in BS 341‑1:1962 [Go to Page]
- Table A.1 — Comparison between valve tapered inlet connections in this British Standard and the nominal sizes in BS 341‑1:1962
- Annex B (informative) Guidance on the calculation of thread data given in Figure 3 to Figure 8
- Annex C (normative) Gauging for taper threads [Go to Page]
- Figure C.1 — Thread form for 16T plug and ring gauges
- Figure C.2 — Thread form for 17T plug and ring gauges
- Figure C.3 — Thread form for 18T, 19T and 26T plug and ring gauges
- Figure C.4 — Thread form for 32T plug and ring gauges
- Table C.1 — Thread taper ratios and angles
- Figure C.5 — Inspection plug gauges for 16T, 18T, 19T, 26T and 32T
- Table C.2 — Inspection plug gauges for 16T, 18T, 19T, 26T and 32T
- Figure C.6 — Inspection plug gauges for 17T
- Table C.3 — Inspection plug gauges for 17T
- Figure C.7 — Inspection ring gauges for 16T, 18T, 19T, 26T and 32T
- Table C.4 — Inspection ring gauges for 16T, 18T, 19T, 26T and 32T
- Figure C.8 — Inspection ring gauges for 17T
- Table C.5 — Inspection ring gauges for 17T
- Figure C.9 — Check gauges for inspection ring gauges for 16T, 18T, 19T, 26T and 32T
- Table C.6 — Check gauges for inspection ring gauges for 16T, 18T, 19T, 26T and 32T
- Figure C.10 — Check gauges for inspection ring gauges for 17T
- Table C.7 — Check gauges for inspection ring gauges for 17T
- Figure C.11 — Use of inspection plug gauges
- Figure C.12 — Use of inspection ring gauges
- Figure C.13 — Use of check gauges
- Bibliography [Go to Page]