API 6A Wellhead Forged Steel Flanges for Sour Gas Service

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.

• 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

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.