BS EN 13789-2010 pdf download.Industrial valves Cast iron globe valves.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 19, Industrial valves — Marking of metallic valves
EN 558, Industrial valves — Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems — PN and Class designated valves
EN 736-1:1995, Valves — Terminology — Part 1: Definition of types of valves
EN 736-2:1997, Valves — Tenninology — Part 2: Definition of components of valves
EN 736-3:2008, Valves — Terminology — Part 3: Definition of terms
EN 1092-2, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories. PN designated — Part 2: Cast iron flanges
EN 1563:1997, Foundirig — Spheroidal graphite cast irons
EN 12266-1. Industrial valves — Testing of valves — Part 1: Pressure tests, test procedures and acceptance criteria — Mandatory requirements
EN 12266-2, Industrial valves — Testing of valves — Part 2: Tests, test procedures and acceptance criteria — Supplementary requirements
EN 12351, Industrial valves — Protective caps for valves with flanged connections
EN 12516-3, Valves — Shell design strength — Part 3: Experimental method
EN 12516-4, Industrial valves — Shell design strength — Part 4: Calculation method for valve shells manufactured in metallic materials other than steel
EN 12570, Industrial valves — Method for sizing the operating element
EN ISO 5210, Industrial valves — Multi-turn valve actuator attachments (ISO 5210:1991)
ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
3 Terms and definitions
For the purposes of this document, the terms and definitions of types of valves and components and the terms and definitions given in EN 736-1:1995, EN 736-2:1997 and EN 736-3:2008 apply.
NOTE The terms maximum aUowable pressure. PS, and test pressure, PT defined in EU Directive 97/231EC (PED) are equivalent to the terms allowable pressure. p. and test pressure. p. defined In EN 736-3:2008.
4 Requirements
4.1 Design
4.1.1 Materials
4.1.1.1 The body and bonnet materials shall be selected from EN 12516-4.
For PN 40 rated valves, spheroidal graphite cast iron only shall be used.
4.1.1.2 The manufacturer shall declare the materials of construction and any coatings of components in contact with the line fluid from which the suitability of the valve for the application can be determined.
4.1.1.3 Welding of grey cast iron and impregnation of castings of all materials is not permitted.
4.1.2 Pressure/temperature ratings
4.1.2.1 The pressure/temperature ratings shall be in accordance with EN 1092-2.
NOTE Annex B may be used to determine the equivalent ISO material grade for the EN material grades specified in
4.1.1.1.
4.1.2.2 Any restrictions of temperature andlor pressure below those specified in EN 1092-2, for example, those imposed by soft seals, special trims, shall be indicated on the valve (see 8.1.2).
4.1.2.3 The use of valves at lower temperatures than shown in the pressure/temperature rating tables in EN 1092-2 is permitted providing that the body and bonnet is manufactured from spheroidal graphite cast iron material grades EN-GJS-350-22-LT or EN-GJS-400-18-LT. For temperatures below the ‘owest temperature shown in the rating tables the maximum allowable pressure shall be no greater than the pressure corresponding to the lowest temperature in the rating tables. The Lowest scheduled operating temperature shall be not less than the temperature specified in EN 1563 for the Charpy impact tests.
4.1.3 Dimensions
4.1.3.1 Face-to-face, centre-to-face and end-to-end dimensions
Face to face and centre-to-face dimensions of flanged valves shall be in accordance with EN 558 and specified by
the purchaser (see Annex A).
The end-to-end dimensions of threaded end valves are at the choice of the manufacturer.
4.1.3.2 Body ends
Flanged ends shall be in accordance with the requirements of EN 1092-2.
Threaded ends shall be of the internal form in accordance with Type R or R to ISO 7-1:1994.
4.1.3.3 Body end port inside diameter
The body end port shall be circular. For unlined vaLves, the body end port inside diameter shall be not less than the
nominal inside diameter specWied in Table 1.
4.1.4 Operation
4.1.4.1 Operating device
Unless otherwise specified by the purchaser, the valve shall be supplied with a handwheel. If the valve is to be operated by an actuator, then the valve/actuator attachment shall be in accordance with EN ISO 5210 for multi-turn actuators. For linear actuators, the valve/actuator attachment is the choice of the manufacturer.BS EN 13789-2010 pdf download.