The Simple Pressure Vessels (Safety) Regulations 1991

Regulation 10

SCHEDULE 3 DESIGN AND MANUFACTURING SCHEDULE

1.  The design and manufacturing schedule must contain a description of the techniques and operations employed in order to meet a relevant national standard or the essential safety requirements specified in Schedule 1.

2.  In particular it must comprise–

(a) a detailed manufacturing drawing of the vessel type;

(b) the manufacturer’s instructions;

(c) a document describing–

(i) the materials selected;

(ii) the welding techniques selected;

(iii) the checks selected; and

(iv) any pertinent details as to the vessel design.

3.  In the case of a schedule relating to two or more vessels of the same family, variations in length of the cylindrical component resulting in modifications of apertures or penetrations must be shown in the drawing for each variant.

4.  In the case of a schedule provided pursuant to regulation 12(3)(b) or regulation 13(3)(b), it must also comprise–

(a) evidence of approval by an approved body of the welding techniques employed and of the welders' and operators' qualifications;

(b) the inspection slip, as defined in paragraph 13(b) of Schedule 1, for the materials used in the manufacture of components and assemblies contributing to the strength of the vessel; and

(c) a report on the examinations and tests performed, or a description of the proposed checks.