API 16A F22 Steel Shale gas wellhead flange ring,Wellhead Flange
Ring
OUR Products including:
Size customized as per drawing
Wellhead Flange,Wellhead Flange Ring,API Certified Wellhead
Flange,High-Pressure Wellhead Flange,High-Temperature Resistance
Flange Corrosion Resistance Wellhead Flange
Our shale gas wellhead flange rings are made of F22 alloy steel and
comply with API 16A standards, offering the following features and
advantages:
Material Properties
- Chemical Composition: F22 alloy steel primarily consists of iron, carbon, chromium,
molybdenum, and other elements, with chromium content around
2.00%-2.50% and molybdenum content around 0.87%-1.13%. The addition
of these alloying elements provides excellent overall performance.
- Mechanical Properties:
- Strength: High tensile and yield strength, with a minimum tensile strength
of 95 KSI (655 MPa) and a minimum yield strength of 75 KSI (517
MPa), enabling it to withstand high pressures.
- Toughness: Elongation and reduction of area are 18% and 35%, respectively,
providing sufficient plasticity and toughness to resist complex
downhole stress conditions.
- Hardness: Hardness typically ranges between 197-237 BHN. According to NACE
MR0175 standards, its maximum hardness can reach 22 HRC, meeting
the wear resistance requirements for shale gas extraction.
Performance Advantages
- Excellent High-Temperature Resistance: Capable of stable long-term operation in medium-to-high
temperature environments (500-650°C), maintaining good mechanical
properties without excessive softening, ensuring sealing integrity
and connection strength.
- Superior Creep Resistance: Minimal deformation under prolonged high-temperature and
high-stress conditions, resisting deformation caused by downhole
high-pressure environments and ensuring wellhead stability and
reliability.
- Strong Oxidation Resistance: Forms a dense oxide layer at high temperatures, protecting the
base metal from further oxidation and extending service life.
- Good Weldability: F22 alloy steel exhibits favorable weldability. With proper
welding materials and techniques—such as preheating, interpass
temperature control, and post-weld heat treatment—it can form
reliable welded joints with other components, meeting wellhead
assembly requirements.
- High Corrosion Resistance: Complies with NACE MR0175 standards, maintaining excellent
corrosion resistance in shale gas environments containing acidic
gases, hydrogen sulfide, and other corrosive media, preventing
leaks due to corrosion
Applications
- Shale Gas Wellhead Equipment: As a critical connecting component in shale gas wellhead systems,
F22 alloy steel flange rings join various wellhead components
(e.g., casing, tubing, valves), ensuring sealing integrity and
stability to prevent gas leaks and enhance extraction safety and
efficiency.
- High-Temperature & High-Pressure Oil/Gas Wells: Suitable for wellhead flange connections in other
high-temperature, high-pressure oil and gas wells, capable of
withstanding complex downhole conditions while providing reliable
sealing and support
Manufacturing & Processing
- Forging Process: Typically produced through forging, where high-temperature
heating and forging refine the material’s internal structure,
eliminating defects like porosity and improving mechanical
properties and uniformity.
- Heat Treatment: Involves normalizing, quenching, and tempering to achieve desired
strength and hardness. Post-treatment, F22 alloy steel exhibits
optimal performance for wellhead flange ring applications.
Standards:
- API 16A Standard: Specifies requirements for wellhead and
Christmas tree equipment, covering materials, design,
manufacturing, and testing. F22 alloy steel flange rings adhere to
API 16A, ensuring quality and performance align with industry norms
for shale gas applications.
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