API 594 check valve
Titlt , swing & Dual Flap Flanged , log , wafer & BUTT WELD Ends
This standard covers the design, materials, face to face dimension, pressure – Temperature ratings
API 600
cast steel cate valves- Flanged & Butt welding ends. API 600 is the main steel cate valve specification
API 602
compact steel cate valve – flanged threaded welding and Extended-Body Ends
API 602 is for too NB (4”) & smaller forged steel gates valve specification
API 603
cast Gate valve corrosion-resistant, Flanged- End
API 603 covers light walled gate valve in size NPS 15 mm to 600 mm (1/2 through 24”), in classes 150,300&600
API 623
cast globe valve – flanged & Butt-weld Ends This standard covers the rudiments for globe valve used in the downstream re finery industry for oil and gas
API 608
Steel Ball valve – flanged and Butt welding Ends. Typically used for floating ball valves API 608 is the purchase specification for class 150,300,600 and 800 class Steel batt valve
API 609
Butter fly valve – Lug – type and wafer – Type and wafer – type. API 609 is a specification for butterfly valve with Lug – Type and wafer – type. Configurations designed for installation. Between ANSI B16 Flanges, 15 To 1500 class
API 598
valve inspection & Testing. API 598 covers the testing and inspection requirements for check, gate, ball, plug & butterfly valve
API 6D
specification for pipeline valve Gate, plug, Bull and check valves. ASME / ANSI B 16.34: Steel valve – Flanged & Butt-welding Ends
ASME B16.34
Is the standard in which – steel valve pressure / temperature ratings are specified
ASME B 16.15
Face to face Dimensions of ferrous valve. B16.15 specifications the face – to –face dimension of all flanged and butt-weld end valves
Common valve types & related test standards
Valve type | common test standard |
Steel ball, gate, globe and check valve | API 598 |
cast Iron. gate valve | API 598, MSSP SP 70 |
Bronze gate, globe and check | MSSP SP 80 |
Pipe line valves | API 6 D,ISO 5208 |
Cast Iron check valve | API 598, MSSP SP 71 |
Cast Iron globe valve | API 598, MSSP SP 85 |
Cast Iron plug valve | API 598, MSSP SP 78 |
Steel ball valve | API 598 , API 6D |
Steel butterfly valve | API 598 |
Cryogenic valve | API 598,BS 6364 |
Pressure relief valves | API 521 |
BALL VALVE
Predominantly equipped with quick-acting 90-degree turn handles, these valves use a ball to control flow to provide easy on-off control. Generally accepted by operators to be faster and easier to operate than gate valves.
Ball valves are mainly designed to conform API 6D (Specification for pipeline valves) and ANSI B16. 34 (Valves Flanged, Threaded and Welding End) or API 6A (Specification for Wellhead and Christmas Tree Equipment) in case of upstream applications. Other related standards such as ANSI B16
BUTTERFLY VALVE
Using a compact design, the butterfly valve is a quick-acting rotary motion valve ideal for tight spaces thanks to its wafer type design. Butterfly valve bodies are offered in many different configurations.
The API 609, ASME B16.34 (pressure and temperature rating), API 598 (testing), ASME B16.5 and ASME B16.47 (flanged ends) and ASME B16.25 specifications cover the dimensions and the tolerances of butterfly valves for the petrochemical industry and piping applications.
CHECK VALVE
Used to prevent backflow, these valves are typically self-activated allowing the valve automatically opens when media passes through the valve in the intended direction and close should flow reverse.
API Spec 6D – Specification for Pipeline Valves, End Closures, Connectors and Swivels
API Std 594 – Check Valves: Flanged, Lug, Wafer and Butt-welding
GATE VALVE
As one of the most common valve types, gate valves use linear motion to start and stop the flow. These are typically not used for flow regulation. Instead, they used in the fully open or closed positions.
GLOBE VALVE
Globe valves are typically applied in modulating control operations. Typically avaialable in three body types, T-body (as shown above), Y-Pattern, and Angle body.
NEEDLE VALVE
Typically used in small diameter piping systems when fine, accurate flow control is needed, Needle valves get their name from the point on a conical disc used within.
PLUG VALVE
Using a quick-acting quarter-turn valve handle, these valves control flow using tapered or cylindrical plugs. They provide some of the best ratings when tight shutoff is essential and are reliable in high-pressure or high-temperature environments.
PRESSURE RELIEF VALVE
Used to help improve safety, these valves are spring-automated and will help to return a system to the desired pressure during over-pressure events.
Ring Type Joint (RTJ) Gaskets
Ring Type Joint gaskets are precision machined metallic gaskets generally used in high pressure applications such as the Oil, Gas, Petrochemical and Offshore industries. This type of gasket is designed to be used in RTJ groove flanges and are produced under license to dimensions as per API-6A and ASME B16.20.
Details:
*Ring Type Joints concentrate the bolt load over a small area producing high sealing stresses.
*As the Ring Type Joint Material should always be softer than the mating flanges, the high seating stress causes ”plasticflow” of the ring joint in the flange faces creating the seal.
*RTJ Gaskets can be produced from a variety of material’s to suit the process application and flange grade.
*Used on high pressure lines up to 20,000 PSI, RTJ’s are an extremely reliable and robust sealing mechanism.
*Standard R type available R11 (1/2”) to R105 (36”) in Oval or Octagonal Section.
*BX, SBX & RX type available for Sub Sea application.
*IX Seal Rings used in Norsok Compact flange assemblies.
RTJ Gasket Profiles:
Oval and Octagonal section Ring type Joints are designed for flanges with standard ring type grooves. These standard shapes are used to seal pressures up to 5,000 psi in accordance with API 6A.The Octagonal cross section has a higher sealing efficiency than the Oval cross section and is therefore preferred.
For more information about RTJ Gasket Profiles please click here.