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What are API 6A Casing Head Piston S Seals
API 6A casing head piston S seals are sealing devices made of rubber or elastic material that are installed on the casing head piston. They are located on the top of the casing head and are used to seal the internal space of the casing head to prevent oil and gas leakage.
special features
API 6A Casing Head Piston S Seals are special in that they comply with API 6A, one of the important standards for equipment and operations in the oil and gas industry. Here are some special features:
- Standard Compliance: API 6A is a standard for the design, manufacture, and operation of oil and gas well equipment that ensures the safety, reliability, and performance of the equipment. Casing Head Piston S Seals meet this standard, demonstrating that they have been rigorously tested and verified to meet industry requirements.
- Pressure tightness: Casing Head Piston S Seals are sealing devices for casing heads with excellent pressure tightness. They can effectively seal the internal space of the casing head to prevent oil and gas leakage and ensure the safe operation of the wellhead.
- Size and compatibility: Casing Head Piston S Seals are sized and designed to comply with API 6A standards to ensure compatibility with other devices and parts that comply with that standard.
Structural characteristics
The structural features of API 6A Casing Head Piston S Seals can vary based on specific design and manufacturing details, but generally share some common features:
1. Rubber or elastic materials: These seals are usually made of rubber or other elastic materials to provide good sealing performance and elastic recovery. These materials are resistant to wear, corrosion, and high temperatures to suit the requirements of oil and gas well environments.
2. Ring structure: Casing Head Piston S Seals usually adopt a ring structure, with an inner bore and an outer diameter, allowing it to be sleeved on the casing head piston. This structure ensures that the seal is fixed in the correct position and cooperates with the casing head to achieve an effective seal.
3. Compressibility design: These seals usually have a certain degree of compressibility, that is, they can be compressed and generate sealing force when installed. When the seals are under pressure, they can expand and fill the space in the casing head, creating an effective seal.
4. Pressure balance design: To achieve a better sealing effect, the structure of Casing Head Piston S Seals usually includes a pressure balance design. This means the seal can remain balanced against pressure differences inside and outside the casing head, reducing the risk of leaks.
API 6A casing head piston S seal
S-Seal is a technologically advanced replacement for traditional three-piece T-Seals or O-rings with back-ups. It is a compact, single-piece seal design featuring an extrusion-resistant elastomer with two anti-extrusion springs molded into the outer edges.
The combined seal can provide leak-free sealing performance under extreme pressure. S-seal is very suitable for many chemical processing, chemical transportation, and oil and gas applications, such as effective sealing applications that meet the following conditions:
- Large gap
- High voltage (bidirectional)
- Remote hardware configuration
- Seal installation channel restricted
- Chemical attack of oilfield medium
The one-piece S-Seal eliminates installation problems that can occur when using multiple component seals. It can be stretched into place without splitting or compromising the non-extrusion elements of the seal.
S-seal is available in material XNBR, HNBR, and FKM with 2 integral anti-extrusion springs. Spring seals can be manufactured in a variety of standard or non-standard sizes, allowing them to be retrofitted into existing O-ring grooves.
Working Conditions
| Temperature range | Pressure | Medium |
| -46℃~+149℃ | ≤20000 PSI | Oil, water, Gas, H2S, CO2, etc |
*Special reminder, if you need this seal product, please provide us with the corresponding drawings so that we can provide you with better help.
| Technical Data Sheet Of XNBR | ||
| Test Method | Norm | Test Values |
| Hardness | ISO 868 | 75 IRHD |
| Specific Weight | ISO 2781 | 1.21 |
| Tensile Strength at break | ISO 37 | 15.6 MPa |
| Elongation at break | ISO 37 | 349% |
| Specific Weight | ISO 2781 | 1.21 |
|
Compression Set 22h/100°C, on slab |
ISO 815
|
29% |
|
Heat Ageing 70h/150°C Hardness Change Tensile Strength Change Elongation Change Weight Change |
ISO 188
|
+7° +2 MPa -19.8% -0.10 gr |
|
Immersion in ASTM oil n°3, 70h/150°C Volume Change Hardness Change Tensile Change Elongation Change |
ISO 1817
|
-0.55% +1.5 +3 MPa -22% |
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