Classification and related standards for ball valves
First, Overview
Ball valves are evolved from plug valves. Its opening and closing parts are used as a sphere, and the sphere is rotated 90° around the axis of the valve stem to achieve the purpose of opening and closing. Ball valve is mainly used to cut off or connect the medium, can also be used for fluid regulation and control, V-type ball valve can be more accurate flow regulation and control, and three-way ball valve is used to distribute the medium and change the flow direction of the medium.
The main advantages of ball valves are:
1, low fluid resistance;
2, switch fast, convenient;
3, good sealing performance;
4, valve stem seal reliable;
5, easy to achieve automatic control and remote control;
6, the channel is smooth and smooth, not easy to deposit media, and the pipeline can be passed.
Second, the classification of ball valves
1, according to the structure of the form:
Floating ball valve, fixed ball valve
2, according to the opening and closing parts of the ball assembly
Top type ball valve, side mounted ball valve, split ball valve
Side mount can also be divided into (integral, two-stage, three-stage and five-stage)
3, according to the sealing surface material
Soft seal ball valve, hard seal ball valve
4, according to the channel type:
Full diameter, necking, double necking
5, according to the valve function and use of mining points
Switch two-way ball valve (O-type ball valve), three-way, four-way reversing shunt ball valve (L-type three-way, T-type three-way, Y-type three-way), V-type adjustment ball valve, insulated jacket ball valve, eccentric half ball valve, three-eccentric metal seal ball valve, spiral ball valve, pipe clearing ball valve, track ball valve, discharge ball valve, stay open ball valve, buried all-welded ball valve, pipeline ball valve, submarine ball valve, water and power ball valve, lock Slag ball valve (lock bucket valve), hydrogen press ball valve, lined ball valve, all-plastic ball valve, ceramic ball valve, oxygen ball valve, vacuum ball valve, slope ball valve, high temperature and high pressure power station water transmission ball valve, double ball valve, multi-function ball valve, etc
6, according to the connection form points
Flange connection ball valve, threaded (internal thread, external thread) connection ball valve, welded (socket welding, butt welding) ball valve, clamp ball valve, clamp ball valve, sleeve connection ball valve, etc
7, according to the driving method points
Handle (wrench) ball valve, turbine driven ball valve, pneumatic ball valve, electric ball valve, hydraulic ball valve, pneumatic hydraulic linkage ball valve, electric hydraulic ball valve, etc
8, according to the use of temperature
Low temperature ball valve, normal temperature ball valve, high temperature ball valve, etc
9, according to the valve seat piston effect sealing principle
DBB ball valve, DIB-I ball valve, DIB-II ball valve
Third, ball valve design related standards
1.GB/T 12237-2007 Steel ball valve for petroleum, petrochemical and related industries
PN16~PN100 DN15~DN500 (flange and welding)
PN16~PN140 DN8~DN50 (threading and welding)
2.GB/T 19672-2005 pipeline valve technical conditions API6D 22nd edition
PN16~PN420 DN15~DN1200
3.GB/T 30818-2014 All-welded ball valve for oil and gas industry pipeline transmission system
PN16~PN160 DN50~DN1500
Class150~Class900 NPS2~NPS60
4.BS EN ISO 17292-2004 Steel ball valves for petroleum, petrochemical and related industries
PN16 25 40 Class150 Class300 Class600 Class800
DN8-DN500(DN15-500 flanges and butt welds) DN8-DN50 (socket welds and threads) NPS1/4 to 20 This standard has replaced BS5351
5.API 608-2002 flanged, threaded and welded metal ball valves
NPS1/2 ~NPS12
150LB 300LB flange and butt welding 150LB 300LB 600LB thread and socket welding
6, GB/T 20173-2013 Oil and gas industry pipeline transmission system pipeline valves
API 6D translation
7, GB 26640-2011 valve shell minimum wall thickness requirements specification
8. GB/T21385-2008 metal sealed ball valve
DN15~DN600 PN16~PN420
9.ISO 7121-1986 flanged steel ball valves
DN10~DN500 PN10~PN100
10, JB/T 12006-2014 steel pipe welding ball valve
DN15~DN50 PN≤PN40 DN65~DN600 PN≤PN25 0℃~150℃
Applicable medium for water, steam steel pipe welding ball valve.
11.GB/T26146-2010 eccentric half ball valve
DN40~DN2000 PN2.5~PN25 gray cast iron, ductile cast iron
DN40~DN2000 PN2.5~PN100 Carbon steel, alloy steel and stainless steel.
12, CJ/T 283-2008 eccentric half ball valve
≤PN16 DN50~DN1000
13.GB/T 15185-1994 Iron and copper ball valves
DN8~DN300
PN≤1.6MPa gray cast iron PN≤4.0MPa ductile cast iron
PN≤2.5MPa malleable cast iron PN≤2.5MPa copper alloy
14.GB/T 4174-2011 Marine electric control ball valve
15, JB/T 7745-1995 Iron and copper ball valves
16, MSS-SP-72-2010 flange and butt welded ball valve (steel, ductile iron, bronze)
DN15~DN600 150Lb-900Lb
17, JPI-7S-48-1999 flange connection ball valve
DN15~DN350 PN16\PN25\PN40 CL150\CL300
18. EN 1983-2006 Industrial valves -- Steel ball valves
DN8~DN400 CL150~CL800
19.ISO 17292-2004 Ball valves of metals for petroleum, petrochemical and related industries
DN15~DN1500 PN10~PN100
20. Other relevant standards
API 6DSS/ISO 14723 Subsea pipeline valve specification
API 6A Specification for wellhead and tree equipment
API 17D subsea pipeline wellhead and tree equipment specification
ISO 13628-8 Specification for the design and operation of subsea pipeline production systems
API 607 Fire test standard for soft sealed valves
API 6FA valve fire resistance test
APL 5L pipeline steel pipe specification
NACE MR0175 is used for metal materials resistant to stress cracking and stress corrosion cracking in oil field vulcanization environments
API 1104 Welding of pipes and associated facilities
ASEM B31.8 Gas transport and distribution line system
BS 7448 part2 Fracture toughness test
