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  • TOBO STEEL GROUP CHINA
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    In the latest vendor rating, TOBO won the excellent rating, it is good, will continue to cooperate.
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    ASTM A213 T9 Alloy steel pipe ,Stable quality , good price, excellent serive, TOBO GROUP is our trustworthy partner .
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API 6A Wellhead Forged Steel Flanges for Sour Gas Service

  • API 6A Wellhead Forged Steel Flanges for Sour Gas Service
  • API 6A Wellhead Forged Steel Flanges for Sour Gas Service
  • API 6A Wellhead Forged Steel Flanges for Sour Gas Service
  • API 6A Wellhead Forged Steel Flanges for Sour Gas Service
  • API 6A Wellhead Forged Steel Flanges for Sour Gas Service
Place of Origin China
Brand Name TOBO
Certification ISO9001:2015; SGS/BV/ABS/LR/TUV/DNV/API/PED available
Model Number API 6A 6B / 6BX
Minimum Order Quantity 1 Piece/Pieces
Price US $ 50 - 500 / Piece
Packaging Details Plywood cases or customized
Delivery Time 7-30 days
Payment Terms L/C,T/T,Western Union
Supply Ability 500 Pieces per Month
Product Details
Product Name API 6A Wellhead Forged Steel Flange Application Wellhead And Christmas Tree Sour Gas Service
Standard API 6A Type 6B And Type 6BX Material Grade AISI 4130 / ASTM A105 / A182 F22, NACE MR0175 Qualified
Pressure Rating 2000 Psi To 15000 Psi Seal Face Ring Joint (R / RX / BX)
Testing 100% NDT (UT / MT) + Hydrostatic Test Temperature Class -46 Deg C To 121 Deg C Per API 6A
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API 6A Wellhead Forged Flanges

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Wellhead Flange Sour Gas Service

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API 6A Forged Steel Flanges
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Product Description
API 6A Wellhead Forged Steel Flanges for Sour Gas Service
Product Overview

API 6A wellhead forged steel flanges are engineered for extreme oil and gas wellhead equipment conditions, specifically designed to withstand sour gas service environments where resistance to hydrogen sulfide cracking and high pressure is critical. These flanges are manufactured to API 6A standards as Type 6B flanges with R and RX ring joint faces, and Type 6BX flanges with BX faces for maximum pressure ratings.

For well streams containing hydrogen sulfide, materials are qualified to NACE MR0175 / ISO 15156 standards, ensuring each API 6A wellhead forged steel flange can be traced back to a tested heat with confirmed hardness and sulfide stress cracking resistance.

Our API 6A wellhead forged steel flanges are manufactured from premium alloy and carbon steels including AISI 4130 and ASTM A105, with comprehensive non-destructive testing coverage including ultrasonic and magnetic particle testing on every component. Ring joint grooves are precision-machined to API 6A tolerances and verified with ring gages, ensuring reliable performance under full well shut-in pressure conditions.

Specifications
Standard API 6A, Type 6B and Type 6BX
Pressure Rating 2000 psi, 3000 psi, 5000 psi, 10000 psi, 15000 psi
Seal Face Ring Joint: R, RX (6B); BX (6BX)
Materials AISI 4130, ASTM A105, A182 F22; NACE MR0175 option for sour gas service
Size Range 1-13/16" to 11" nominal API sizes
Testing 100% ultrasonic and magnetic particle test, hydrostatic test
Temperature Class -46°C to 121°C per API 6A
Documentation Material certificate, NDT reports, hardness report
Key Advantages
  • Manufactured to API 6A with ring joint grooves verified by ring gage for reliable metal-to-metal sealing
  • NACE MR0175 qualified material option for sour gas service with H2S resistance
  • 100% NDT coverage with ultrasonic and magnetic particle testing on every wellhead flange
  • Pressure ratings from 2000 psi to 15000 psi cover standard wellhead configurations
  • Hardness controlled and reported for each heat to meet sour service limits
  • Full documentation package accepted by wellhead assemblers and operators
Quality Assurance & Documentation

API 6A wellhead forged steel flanges for sour gas service are released only after complete test package approval. Every component undergoes ultrasonic and magnetic particle testing, ring joint groove verification with correct ring gages, and hardness value checks against sour service limits. Each flange ships with comprehensive documentation including material certificates, NDT reports, and hardness reports, with quality records available for review by wellhead manufacturers and operating companies.

Frequently Asked Questions
What is the difference between API 6A Type 6B and Type 6BX flanges?
Type 6B flanges use R or RX ring gaskets and are rated up to 5000 psi, while Type 6BX flanges use BX ring gaskets for ratings from 5000 psi up to 15000 psi. The groove dimensions and gasket styles are defined by API 6A.
How do you qualify material for sour gas service?
For sour gas service we supply material qualified to NACE MR0175 / ISO 15156, with controlled hardness, proper heat treatment and sulfide stress corrosion cracking test documentation where required by the project.
What testing is performed on each wellhead flange?
Every API 6A wellhead forged steel flange receives ultrasonic testing and magnetic particle testing, and the ring joint groove is verified with a ring gage. Hydrostatic testing is performed as required by the specification.
Can you provide the flange with a full documentation package?
Yes. Each flange ships with material certificates, NDT reports, hardness reports and dimensional inspection reports, and third-party inspection by recognized agencies can be arranged before delivery.
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