Upstream & Offshore (HPHT & Subsea)
Operating in harsh marine environments, subsea depths, and High-Pressure High-Temperature (HPHT) wellhead zones demands ultimate mechanical reliability. Equipment is subjected to hydrostatic ocean pressures, intense structural flexure, dynamic topside vibration, sour gas (H2S) exposure under NACE MR0175 / ISO 15156, and wellhead working pressures reaching up to 20,000 PSI.
- Exploration & Production (E&P) operators
- Offshore drilling contractors
- FPSO operators
- Subsea tree and Blowout Preventer (BOP) OEMs
- Subsea piping EPCs
- Naval marine infrastructure contractors
Primary Application Areas
API 6A wellhead Christmas trees, subsea BOP stack connections, offshore production risers, subsea manifolds, choke-and-kill manifolds, high-pressure mud pumps, and topside separation units.
Common Flange Types & Standards
API 6A Type 6B & 6BX Flanges
Heavy-duty, extreme-pressure flanges engineered for wellhead, BOP, and Christmas tree assemblies.
ASME B16.5 / B16.47 Weld Neck Flanges (WN - RTJ Facing)
Standard high-pressure connections for topside process manifolds and riser piping.
Engineered Gasket & Sealing Selection
API Spec 6A & 17D Ring Type Joint (RTJ) Gaskets
Solid metal RX, BX, and pressure-balanced SRX / SBX subsea profiles machined in Inconel 718, Super Duplex S32750, and 316L SS with strict hardness verification to force plastic seal deformation without damaging expensive groove faces.
API 6FB Fire-Safe Flange Isolation Kits (FIK - TX-ISOPRO)
High-dielectric G10/G11 Glass-Reinforced Epoxy (GRE) retainers with spring-energized PTFE seal elements engineered for splash-zone atmospheric protection and subsea Cathodic Protection (CP) isolation.
Compact Flange IX Metallic Seals
Machined metallic seal rings engineered for NORSOK L-005 compact flanges to provide dual-cone seating under severe dynamic bending moments.
Severe-Service Spiral Wound Gaskets (ASME B16.20)
Winding metallurgy in Inconel 625 or 316L with high-density flexible graphite or ePTFE fillers for topside gas compression and separation units.
