SIST EN 1983:2014

SIST EN 1983:2014 is the Slovenian standard identical to EN 1983:2013, published by SIST. It specifies requirements for industrial steel ball valves with flanged, threaded, socket welding or butt welding ends. It is written for valves mainly used in industrial and general-purpose applications, where the purchaser and manufacturer need a clear basis for design, testing, marking and designation.

What does SIST EN 1983:2014 specify?

SIST EN 1983:2014 specifies the construction, performance, testing and marking requirements for steel ball valves. The document covers the valve sizes and pressure designations that fall within its scope, and it organizes the subject into clauses on scope, references, terms, requirements, test procedures, compliance, designation, and marking and storage.

The standard applies to valves with DN 4 to DN 900 and PN 6 to PN 100, plus Class 150 to Class 4 500, depending on the end connection. In practice, that means a purchaser must match the valve body end type and pressure designation to the intended pipework and service conditions.

What are the key requirements of SIST EN 1983:2014?

Design and construction

SIST EN 1983:2014 requires valves to be either full bore or reduced bore, and the body design must suit the declared end connection and pressure designation. Body design is tied to EN 12516-1, EN 12516-2, EN 12516-3 or EN 13445-3, which matters because the valve shell has to be strong enough for the intended pressure service.

The ball port has to be circular, with minimum effective diameters given in a table by size and bore type. The practical point is that the manufacturer must control the flow passage size, and the purchaser should specify a particular ball construction if that matters to the application.

The shaft has to be anti-blow out, and valves shall have an anti-static feature according to Annex A. Fire safe design is required only when specified, and then the valve is type tested to EN ISO 10497.

For DN 50 and larger, the body design may allow a drain tapping when specified. This is useful where the valve needs draining or maintenance access, but the tapping thread type and size must follow the document.

Materials, ratings and dimensions

Materials have to suit the operating conditions, especially the maximum allowable temperature shown on the identification plate. Shell materials come from EN 1503-1 and EN 1503-2 or EN 12516-1, and bolting comes from EN 1515-1 and EN 1515-2.

Pressure/temperature ratings for flanged valves follow EN 1092-1 or EN 1759-1, while welding-end and threaded-end valves use EN 12516-1. The manufacturer must state any extra pressure or temperature limits caused by closure materials, so the user can see the real service limit.

Dimensions are linked to the end type. Face-to-face dimensions for Class valves follow EN 558, butt-welding end dimensions follow EN 12982, and body-end dimensions follow EN 1092-1, EN 1759-1, EN 12627, EN 12760 or the thread standards named in the document.

Operation, testing and delivery

Ball valves are closed by turning the handwheel or lever clockwise when facing the operating device, and the valve must stop in both fully open and fully closed positions. If an actuator attachment is required, the valve must accept a part-turn actuator with EN ISO 5211 interface dimensions.

Each valve has to be pressure tested by the manufacturer before despatch to EN 12266-1, and additional finished-valve tests may follow EN 12266-2. Seat tightness uses Rate A for elastomeric or polymeric seating and Rate B for other seating.

The document also covers declaration of compliance, designation wording, marking to EN 19, supplementary marking for pressure and temperature limits, and preparation for storage and transport.

What terms does SIST EN 1983:2014 define?

• DN - The nominal size designation used throughout the tables to state valve size and applicability.
• PN - The pressure designation series used for metric-designated valves.
• Class - The pressure designation series used for class-designated valves.
• Full bore - A valve pattern in which the flow passage is not reduced in the open position.
• Reduced bore - A valve pattern in which the flow passage is smaller than the pipe size.
• Effective diameter - The manufactured minimum diameter through the flow passage in the fully open position.
• Anti-blow out - A shaft feature intended to prevent the shaft from being forced out of the valve.

Who uses SIST EN 1983:2014?

SIST EN 1983:2014 is used by valve manufacturers, design engineers, purchasers, quality managers and test laboratories. They use it to select end connections, define size and pressure designation, choose materials, verify shell strength, run pressure tests, decide marking, and prepare the valve for delivery and installation.

It is also useful in procurement and technical review for industrial and general-purpose valve applications, because Annex B lists the information the purchaser should supply with the enquiry and order.

What changed in SIST EN 1983:2014 from the previous edition?

SIST EN 1983:2014 supersedes EN 1983:2006. The foreword states three main changes: the normative references were updated, EN 13445-3 was added as a reference for body design and shell design strength, and the compulsory marking in Clause 8.1 was updated.

Which standards are used with SIST EN 1983:2014?

• EN 19 - Defines the marking of metallic valves.
• EN 736-1, EN 736-2, EN 736-3 - Provide valve terminology and component definitions.
• EN 12266-1 and EN 12266-2 - Set pressure test methods, acceptance criteria and supplementary valve tests.
• EN 12516-1, EN 12516-2, EN 12516-3, EN 13445-3 - Support shell and body design strength.
• EN 558 and EN 12982 - Cover face-to-face and end-to-end dimensions.
• EN 1092-1 and EN 1759-1 - Cover flanges and flange dimensions.
• EN 12627 and EN 12760 - Cover butt welding ends and socket welding ends.
• EN 1503-1, EN 1503-2, EN 1515-1, EN 1515-2 - Cover body/bonnet materials and bolting.
• EN ISO 5211 and EN ISO 10497 - Cover actuator mounting and fire type testing.
• EN ISO 228-1, ISO 7-1, ASME B1.20.1 and ASME B16.34 - Support threaded ends and related end-connection details.

What does the SIST EN 1983:2014 document contain?

The document contains design requirements, size and pressure tables, dimensional rules, testing rules, marking rules and shipment-preparation rules. It also includes figures for full-bore and reduced-bore patterns, typical ball valve construction and ball construction examples.

The tables give the allowed DN and pressure designation ranges for each end connection, minimum effective diameters for the ball port, drain tapping sizes, and the order of omitted body marking items for smaller valves. In practice, these tables are the parts designers and buyers use to specify the exact valve variant.

The annexes add anti-static design rules, a purchaser-information checklist and the link to the PED. That makes the standard useful both for technical specification and for compliance review.