Offshore SPM and Pipeline Valve Supplier — API 6D, Large Bore, NACE
API 6D trunnion ball valves, 24"–48" bore, NACE MR0175, MOV actuated, fire-safe API 607 — for SPM, PLEM, and offshore crude oil pipeline projects.
Supreme Valves India is an established supplier of API 6D trunnion mounted ball valves for Single Point Mooring (SPM), Pipeline End Manifold (PLEM), and offshore crude oil pipeline projects. We supply 24" to 48" bore valves with MOV actuation, NACE MR0175/ISO 15156 compliance, and fire-safe certification for Indian and international offshore EPC contractors.
What is an SPM System?
A Single Point Mooring system is a floating buoy infrastructure that allows crude oil tankers to offload crude oil while moored offshore, transferring oil via submarine and surface pipeline to an onshore tank farm. SPM systems require large bore isolation valves on the PLEM (subsea manifold), riser balancing valves, shore receiving station isolation valves, and emergency shutdown (ESD) valves.
Typical Valve Scope for SPM Projects
Materials and Certification for Sour Crude
NACE MR0175 / ISO 15156 compliance is mandatory for sour crude service (H₂S partial pressure > 0.0003 MPa). Key requirements:
- Body: ASTM A105N (normalized) or ASTM A216 WCB with hardness ≤ 22 HRC
- Trim (seats, stem, trunnion): F51 Duplex Stainless Steel or Alloy 625 weld overlay
- Seals: FKM (Viton) AED grade — Anti-Explosive Decompression resistant
- Bolting: A193 B7M / A194 2HM (NACE grade)
- All hardness to be certified on EN 10204 3.1 MTCs
See our detailed guide: NACE MR0175 Valve Materials for Sour Service.
MOV Actuation for SPM Valves
Motor Operated Valves (MOV) are required for remotely controlled ESD functions and for large-bore valves too heavy for manual gear operation. For SPM projects:
- Electric MOV: Rotork IQ3 / EIM / AUMA — fail-safe spring return or battery backup
- Hydraulic actuator: For subsea or explosion-risk environments
- Actuator sized per valve torque table × 1.5 safety factor
Full MOV selection reference: Large Bore MOV Ball Valve — SPM Offshore Guide.
Fire Safe Qualification
All pipeline isolation valves on hydrocarbon service must carry API 607 fire-safe certification. After fire exposure, the valve must maintain shutoff with metal-to-metal secondary seat. Our API 6D trunnion ball valves carry third-party fire safe test certificates. See our API 6D Ball Valve Guide for Offshore SPM Pipeline and our API 6D Trunnion Ball Valve product page.
Typical Project Reference
SPM-2 project (offshore, India west coast): 48" Class 300 ball valves MOV operated, 24" Class 300 ball valves, barred tee fittings WPHY 65/ASTM A860, associated globe and gate valves Class 600 — complete EPC package quoted with delivery DDP Vadinar Gujarat. For piggable fittings information see our guide on Barred Tee and Piggable Fittings for Offshore Pipelines.
Frequently Asked Questions
What pressure class do SPM ball valves typically use?
Most SPM pipeline applications use ANSI Class 300 (PN 50), which provides 720 PSI cold working pressure for crude oil at operating temperatures. Some high-pressure production pipelines use Class 600.
How long does it take to supply 48" API 6D ball valves?
Large bore (36"–48") API 6D trunnion ball valves with MOV and NACE compliance require 26–40 weeks from order to delivery for custom manufacture. Standard sizes (6"–16") are available in 12–18 weeks.
Can Supreme Valves supply barred tees and fittings together with valves?
Yes — we can package barred tees (WPHY 65 / ASTM A860), elbows, flanges, and valves as a single supply package with consolidated documentation for SPM/PLEM projects.
Sourcing API 6D Valves for an SPM or Pipeline Project?
Share your valve schedule with size, pressure class, and actuation requirements. We provide technical submittals, third-party test certificates, and DDP delivery to Indian ports.