BS 8451:2004
$102.76
Rubber hoses for gas welding, cutting and allied processes. High kink-resistant heavy duty welding hose (type H). Specification
| Published By | Publication Date | Number of Pages |
| BSI | 2004 | 18 |
This British Standard specifies requirements for two classes of flexible rubber hose for gas welding and allied processes for use up to a maximum working pressure of 20 bar1) over the temperature range −25 °C to +70 °C. There is no subdivision of the classes because only the high kink resistant hose is specified.
Type H hoses for gas welding, cutting and allied processes are mainly intended for use in long lengths in the construction and military sectors where the full length of hose might not be visible to the welding operative.
NOTE The hose is designated Type H, to maintain a relationship with BS 5120:1987.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD |
| 2 | Committees responsible for this British�Standard |
| 3 | Contents |
| 5 | 1 Scope 2 Normative references 3 Terms and definitions |
| 6 | 4 Classification 5 Materials and construction 6 Colour identification Colour of hose cover 7 Dimensions and tolerances 7.1 Bore sizes Nominal bore 7.2 Cut lengths and tolerances |
| 7 | 8 Physical properties of lining and cover 8.1 Tensile strength and elongation at break Tensile strength and elongation at break 8.2 Accelerated ageing 8.3 Non-ignition 8.4 Resistance to liquids 8.5 Abrasion resistance 9 Performance 9.1 Hydrostatic pressure requirements Hydrostatic pressure rating |
| 8 | 9.2 Adhesion 9.3 Flexibility 9.4 Low temperature flexibility 9.5 Resistance to crushing 9.6 Resistance to hot surfaces 9.7 Resistance to ozone 9.8 Permeability to gas (class B only) 9.9 Resistance to kinking |
| 9 | 10 Marking |
| 10 | Annex A (normative) Method of test for non-ignition Apparatus Ignition test apparatus, Heating furnace Tubular sliding resistance, Calibrated flowmeter for oxygen, Nitrogen-filled mercury-in-glass thermometer, Procedure |
| 11 | Apparatus for ignition tests on lining samples |
| 12 | Annex B (normative) Method of test for resistance to Procedure Calculation of results Annex C (normative) Method of test for crush resistance Connect the hose to a supply of air maintained at a constant pressure of (30.0�±�1) mbar at the i… Apply a force of (340�±�10)�N evenly over a length of (25 ±�1)�mm of the hose and after (30�±�2.5… Annex D (normative) Method of test for resistance to hot surfaces Cut a length of hose (100 ± 10)�mm in length. Place the hose at right angles to a heated bar of (… After (60 ± 1)�s, remove the hose and examine for any exposure of the reinforcement. |
| 13 | Typical apparatus for determining resistance to hot surfaces |
| 14 | Annex E (normative) Method of test for resistance to kinking Clip an appropriate nut and nipple conforming to BS EN 560 to each end of the test hose. Lay the … Pull the movable block axially away from the fixed block at a steady rate until the hose straight… Record the lowest pressure reading obtained on the manometer during the straightening of the hose. |
| 15 | Typical apparatus for resistance to kinking test |
| 17 | Bibliography |
