OPERATION AND MAINTENANCE MANUAL
12-2016
6
2.4 REFERENCE STANDARDS
EN 1074-1
Valves for water supply. Fitness for purpose requirements and appropriate
verification tests. General requirements
EN 1074-2
Valves for water supply. Fitness for purpose requirements and appropriate
verification tests. Isolating valves.
89/H-02650
Valves and pipelines. Pressure and temperature ratings.
EN 1092-2
Flanges and their joints. Circular flanges for pipes,
valves, fittings and accessories, PN designated. Cast iron flanges.
EN19
Industrial valves. Marking of metallic valves
EN 12266-1
Industrial valves. Testing of metallic valves. Pressure tests, test procedures
and acceptance criteria. Mandatory requirements.
EN 558
Industrial valves. Face-to-face and centre-to-face dimensions of metal valves
for use in flanged pipe systems. PN-designated valves.
EN ISO 6708
Pipework components. Definition and selection of DN (nominal size).
EN 1559-1
Founding. Technical conditions of delivery. General.
EN 1561
Founding. Grey cast irons.
EN 1563
Founding. Spheroidal graphite cast irons.
EN 1370
Founding. Surface roughness inspection by
visual tactile comparators.
EN 10088-1
Stainless steels. List of stainless steels.
74/H-84032
Spring steel. Grades.
EN 1982
Copper and copper alloys. Ingots and castings.
EN 12420
Copper and copper alloys. Forgings.
EN ISO 4032
Hexagon regular nuts (style 1). Product grades A and B.
ISO 965-1
General purpose ISO metric threads. Tolerances. Principles and basic data.
ISO 2903
Trapezoid ISO metric threads. Tolerances.
EN ISO 4762
Hexagon socket head cap screws.
EN ISO 4027
Hexagon socket set screws with cone point.
EN 10204
Metallic products. Types of inspection documents.
ISO 1629
Rubbers and latices. Nomenclature.
EN ISO 1873-1
Plastics. Polypropylene (PP) moulding and extrusion materials. Designation
system and basis for specifications.
EN ISO 1874-1
Plastics. Polyamide (PA) moulding and extrusion materials. Designation
system and basis for specification.
EN ISO 12944-5
Paints and varnishes. Corrosion protection of steel structures by protective
paint systems. Protective painting systems.
2.5 ORDERING INFORMATION
Water supply system fittings are specific purpose industrial fittings, therefore orders must include:
- Part Number (P/N)
- intended use, e.g. for water supply systems, sea water, etc.
and:
- nominal diameter, acc. to EN ISO 6708
- nominal pressure, acc. to 89/H-02650;
- type of body material — acc. to EN 1561; EN 1563
- maximum operating temperature, acc. to 89/H-02650.
2.6 PRODUCTION AND ACCEPTANCE
Type 2502 and 2511 gate valves with soft seals and opening indicator are accepted and produced in
accordance with EN 1074-2 (Valves for water supply. Fitness for purpose requirements and appropriate
verification tests. Isolating valves) and EN 12266-1 (Industrial valves. Testing of valves). All gate valves are leak
tested (100%). The tests include external body tightness and closing tightness.
