The Road Vehicles (Construction and Use) Regulations 1986 No. 1078

SCHEDULE 4 E+W+S GAS CONTAINERS

PART II E+W+S SPECIFICATION FOR BRASS OR BRONZE VALVES

Manufacture of valves E+W+S

1.  The stamping or pressing from which each valve is manufactured shall be made from bars produced by (a) extrusion, (b) rolling, (c) forging, (d) extrusion and drawing, or (e) rolling and drawing.

Commencement Information

I1 Sch. 4 Pt. II para. 1 in force at 11.8.1986, see reg. 1

Heat treatment E+W+S

2.  Each stamping or pressing shall be heat treated so as to produce an equiaxed microstructure in the material.

Commencement Information

I2 Sch. 4 Pt. II para. 2 in force at 11.8.1986, see reg. 1

Freedom from defects E+W+S

3.  All stampings or pressings and the bars from which they are made shall be free from cracks, laminations, hard spots, segregated materials and variations in composition.

Commencement Information

I3 Sch. 4 Pt. II para. 3 in force at 11.8.1986, see reg. 1

Tensile test E+W+S

4.  Tensile tests shall be made on samples of stampings or pressings taken at random from any consignment. The result of the tensile test shall conform to the following conditions—

• Yield Stress.—Not less than 231.6 N/mm ².

• Ultimate Tensile Stress.—Not less than 463.3 N/mm ².

• Elongation on 50 mm gauge length.—Not less than 25%.

Note.—When the gauge length is less than 50 mm the required elongation shall be proportionately reduced.

The fractured test piece shall be free from piping and other defects (see paragraph 3 of this Part of this Schedule).

Commencement Information

I4 Sch. 4 Pt. II para. 4 in force at 11.8.1986, see reg. 1