STANDARD TECHNICAL SPECIFICATION Ball Valves PDF
STANDARD TECHNICAL SPECIFICATION Ball Valves PDF
STANDARD TECHNICAL SPECIFICATION Ball Valves PDF
PE-SS-999-100-M004
STANDARD TECHNICAL SPECIFICATION VOLUME. II B
FOR SECTION D
BALL VALVES REV. NO. 04 DATE. 29.05.2012
SHEET 1 OF 2
1 GENERAL
This specification covers the design, materials, construction features, manufacture and testing of Ball valves
at Vendor’s or/ and sub-Vendor’s works inclusive of painting and packing requirements.
3 DESIGN REQUIREMENTS
3.1 These valves shall be used for non-corrosive media like compressed air systems (i.e. service air, instrument
air etc) and shall be of non-fire safe design.
3.2 Valves shall be selected in the appropriate rating based on the pressure/temperature conditions and service
media mentioned in Data sheet-A of Vol IIB Section D.
3.3 Valves with screwed/socket welding ends up to size of 50mm NB shall be in 3 piece construction and valves
of size 65mm NB and above with flanged/butt welding ends shall be short body design and in 3 piece/2
piece construction.
4 Materials
4.1 The materials of construction of main parts Ball valves shall be as specified in Data Sheet-A.
4.2 The materials of construction of the remaining parts shall be as per the relevant standard governing the
valves. These materials shall be subjected to approval.
4.3 Material used in manufacture of valve shall be of tested quality.
5 CONSTRUCTION FEATURES
5.1 All valves with screwed ends shall have screwed female parallel pipe threads as per IS: 554/ASME B 1.20.1
5.2 All valves with flanged ends shall have raised face flanges and drilling details as per ANSI B16.5
5.3 Valves with socket welded and butt welded ends shall have extended pieces. These extended pieces shall
be connected through screwed ends on one side and the other end will be suited to match the pipe
depending on the type of end details i.e. socket/butt welds ends. Socket ends and Butt weld ends shall be
as per ASME B16.11 and ASME B16.25 respectively.
5.4 All valves up to 50mm NB shall be of reduced port and 65mm and above shall be of full bore.
5.5 Valves of size 200 NB & above shall be gear operated.
5.6 Body seats shall be of renewable type and shall be of moulded PTFE completely contained and shall
provide leak tightness in either direction and be suitable for service temperatures.
5.7 All the valves shall be provided with integral stop on body limiting quarter turn operation.
5.8 All the ball valves shall be of tight shut off type and the lever shall be designed such that lever is parallel to
the flow direction when the valve is in open position.
5.9 All the ball valves fitted with a steel lever shall be closed by turning the lever in the clockwise direction. The
direction of closing the valve and “Shut” position shall be marked on the valves. The lever shall have plastic
covering. For gear operated valves the hand wheel shall clearly marked Open & Shut with arrows indicating
SPECIFICATION NO.PE-SS-999-100-M004
STANDARD TECHNICAL SPECIFICATION VOLUME. II B
FOR SECTION D
BALL VALVES REV. NO. 04 DATE. 29.05.2012
SHEET 2 OF 2
the direction of rotation which they refer. Valves shall be closed by rotating the hand wheel in the clock wise
direction when looking at the face of the hand wheel.
5.10 Each lever / hand wheel of the valve shall be fitted with a circular/ rectangular nameplate of SS material
indicating the purchaser’s Valve Tag No. and service description.
6 MANUFACTURE OF VALVES
6.1 Valve castings shall be procured from foundries observing strict quality control and approved by reputed
customers.
6.2 Particular care shall be taken to ensure that all foundry sand and loose material is properly removed from
castings by fettling before the valve’s manufacture is started.
a) All the valves shall be tested hydraulically for strength and tightness of seats at the pressures as
mentioned in BSEN ISO 17292
b) No leakage shall be allowed for any size of the valve covered under this specification.
9 Valve Tag Nos. shall also be incorporated in all the dispatch documents.