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Duqm · Marine & Offshore Service

Valves for Marine & Offshore Service — Duqm

Duqm is Oman's fastest-growing industrial zone — the OQ Duqm Refinery (230,000 bpd) processes crude from Oman's southern fields and requires API 6D ball valves, ASME B16.34 gate valves, and sour-service NACE MR0175 trim for heavy crude processing; Oman Drydock Company, the Middle East's largest dry dock, requires marine-grade valves for ship repair; the Duqm Petrochemical Project (joint ORPIC/Kuwait Petroleum) will produce 900,000 tonnes/year of polypropylene; Vajra Industrial Solutions supplies API 6D and ASME B16.34 compliant ball valves, gate valves, and butterfly valves to OQ Duqm projects and Oman Drydock with full ADNOC/PDO-equivalent documentation and Oman Chamber of Commerce attestation.

Trunnion ball valves, butterfly valves and gate valves in Super Duplex (F53) and Duplex (F51) for FPSO, offshore topsides, subsea wellheads, and marine seawater service.

API 6DNORSOK M-710 (Elastomer qualification)DNV-OS-D101 (Marine systems)Lloyd's RegisterNACE MR0175 / ISO 15156
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API 6D Certified
ASME B16.34
ISO 9001:2015
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Marine & Offshore Service Valves — Available in Duqm

Trunnion Ball Valve (Super Duplex)

Class 150 / 300 / 600 / 900 / 1500

Full-bore isolation for seawater injection, produced water, and topside process — maximum corrosion resistance in high-chloride environments

Materials: Super Duplex UNS S32750 (F53), Duplex UNS S31803 (F51), Inconel 625 overlay for severe service  ·  Standards: API 6D, API 6FA, NACE MR0175, NORSOK M-710
View Trunnion Ball Valve (Super Duplex) options for Duqm →

Butterfly Valve (Duplex / Super Duplex)

PN 10 / PN 16 / Class 150 / 300

Seawater cooling and ballast system isolation on FPSOs and offshore platforms — wafer or double-flanged, high-chloride resistant

Materials: Duplex UNS S31803 body, Super Duplex disc for seawater, EPDM or PTFE seat  ·  Standards: API 609, EN 593, DNV-OS-D101
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Gate Valve (Slab / Expanding, Offshore Spec)

Class 600 / 900 / 1500 / 2500

Through-conduit full-bore isolation for subsea wellhead and riser systems with pigging requirements

Materials: A182 F51 Duplex, A182 F53 Super Duplex, Inconel 625 overlay hard-facing  ·  Standards: API 6D, NACE MR0175, ISO 14313
View Gate Valve (Slab / Expanding, Offshore Spec) options for Duqm →

Swing / Tilting Disc Check Valve (Marine Grade)

Class 150 / 300 / 600

Non-return valve on seawater lift pumps, ballast systems, and produced water injection

Materials: Super Duplex UNS S32750, Duplex UNS S31803, bronze for low-pressure seawater service  ·  Standards: API 6D, DNV-OS-D101, NACE MR0175
View Swing / Tilting Disc Check Valve (Marine Grade) options for Duqm →

Marine & Offshore Service Industry in Duqm

Duqm is Oman's fastest-growing industrial zone — the OQ Duqm Refinery (230,000 bpd) processes crude from Oman's southern fields and requires API 6D ball valves, ASME B16.34 gate valves, and sour-service NACE MR0175 trim for heavy crude processing; Oman Drydock Company, the Middle East's largest dry dock, requires marine-grade valves for ship repair; the Duqm Petrochemical Project (joint ORPIC/Kuwait Petroleum) will produce 900,000 tonnes/year of polypropylene; Vajra Industrial Solutions supplies API 6D and ASME B16.34 compliant ball valves, gate valves, and butterfly valves to OQ Duqm projects and Oman Drydock with full ADNOC/PDO-equivalent documentation and Oman Chamber of Commerce attestation.

Oil Refining (OQ Duqm Refinery)Petrochemical ManufacturingMaritime & Shipbuilding (Oman Drydock)Fisheries & Food ProcessingSEZ Industrial Development

Critical Valve Requirements

Super Duplex (UNS S32750/S32760) or Duplex (UNS S31803) for all seawater-wetted surfaces — PREN ≥40 for super duplex
NORSOK M-710 elastomer qualification testing for FPSO and North Sea applications
NACE MR0175 / ISO 15156 compliance for sour (H₂S-containing) produced fluids
DNV-OS-D101 or Lloyd's Register certification for marine system valves
API 607 fire-safe design for hydrocarbon-carrying valves on offshore topsides
Cathodic protection compatibility — valves on submerged structures require galvanic compatibility
Impressed current cathodic protection (ICCP) isolation: electrically isolating flanges where required
Full documentation pack: EN 10204 3.2 material certs, PMI, charpy impact, hardness survey

Why Duqm's Oil Refining (OQ Duqm Refinery) Sector Needs Marine & Offshore Service Valves

Duqm is Oman's fastest-growing industrial zone — the OQ Duqm Refinery (230,000 bpd) processes crude from Oman's southern fields and requires API 6D ball valves, ASME B16.34 gate valves, and sour-service NACE MR0175 trim for heavy crude processing; Oman Drydock Company, the Middle East's largest dry dock, requires marine-grade valves for ship repair; the Duqm Petrochemical Project (joint ORPIC/Kuwait Petroleum) will produce 900,000 tonnes/year of polypropylene; Vajra Industrial Solutions supplies API 6D and ASME B16.34 compliant ball valves, gate valves, and butterfly valves to OQ Duqm projects and Oman Drydock with full ADNOC/PDO-equivalent documentation and Oman Chamber of Commerce attestation. Key facilities in the Duqm area — including OQ Duqm Refinery (230,000 bpd — Oman's second major refinery), Oman Drydock Company (Middle East's largest dry dock), Duqm Petrochemical Project (Phase 2 polypropylene + ethylene) — rely on Trunnion Ball Valve (Super Duplex) for their oil refining (oq duqm refinery) operations. Vajra Industrial Solutions supplies Trunnion Ball Valve (Super Duplex), Butterfly Valve (Duplex / Super Duplex), Gate Valve (Slab / Expanding, Offshore Spec), Swing / Tilting Disc Check Valve (Marine Grade) for marine & offshore service projects across Al Wusta, with full API 6D and NORSOK M-710 (Elastomer qualification) compliance documentation — EN 10204 3.1 material test certificates, API 598 pressure test reports, and third-party inspection co-ordination available for every order.

Delivery to Duqm

Vajra Industrial Solutions offers export documentation and delivery to Duqm in 7–14 business days. Emergency dispatch available for plant shutdowns and critical site requirements.

Also serving: OQ Duqm Refinery (230,000 bpd — Oman's second major refinery), Oman Drydock Company (Middle East's largest dry dock), Duqm Petrochemical Project (Phase 2 polypropylene + ethylene), Kuwait Petroleum International Duqm petrochemical, BP Oman gas block

FAQ — Marine & Offshore Service Valves in Duqm

Do you supply marine & offshore service valves in Duqm?
Yes. Vajra Industrial Solutions supplies Trunnion Ball Valve (Super Duplex), Butterfly Valve (Duplex / Super Duplex), Gate Valve (Slab / Expanding, Offshore Spec), Swing / Tilting Disc Check Valve (Marine Grade) for marine & offshore service applications in Duqm, Al Wusta. Duqm is Oman's fastest-growing industrial zone — the OQ Duqm Refinery (230,000 bpd) processes crude from Oman's southern fields and requires API 6D ball valves, ASME B16.34 gate valves, and sour-service NACE MR0175 trim for heavy crude processing; Oman Drydock Company, the Middle East's largest dry dock, requires marine-grade valves for ship repair; the Duqm Petrochemical Project (joint ORPIC/Kuwait Petroleum) will produce 900,000 tonnes/year of polypropylene; Vajra Industrial Solutions supplies API 6D and ASME B16.34 compliant ball valves, gate valves, and butterfly valves to OQ Duqm projects and Oman Drydock with full ADNOC/PDO-equivalent documentation and Oman Chamber of Commerce attestation. We offer export documentation and delivery to Duqm in 7–14 business days with full documentation and third-party inspection.
What certifications are required for marine & offshore service valves in Duqm?
For marine & offshore service in Duqm, the applicable standards are: API 6D, NORSOK M-710 (Elastomer qualification), DNV-OS-D101 (Marine systems), Lloyd's Register, NACE MR0175 / ISO 15156, API 607 (Fire test), ASME B16.34, ISO 14313. All valves are supplied with full documentation including material test reports (EN 10204 3.1/3.2), pressure test certificates, and dimensional inspection reports. Third-party inspection (TPI) by EIL, Bureau Veritas, Lloyd's Register, or the client's nominated inspector can be arranged.
What is the delivery time for marine & offshore service valves to Duqm?
Standard stock sizes: export documentation and delivery to Duqm in 7–14 business days. Custom sizes and special materials (Duplex, Hastelloy, P91): 4–8 weeks manufacturing lead time. Express dispatch available for urgent site requirements. Contact us at +91-9979774557 or sales@vajravyuh.com with your specification and required delivery date.
Why is standard SS 316 not suitable for offshore seawater service?
Stainless steel SS 316 (UNS S31600) has a PREN (Pitting Resistance Equivalent Number) of approximately 25, which is insufficient to resist pitting and crevice corrosion in seawater (chloride concentrations 18,000–35,000 ppm). Localised pitting can initiate within weeks in warm seawater. Duplex stainless (UNS S31803, PREN ~35) and Super Duplex (UNS S32750, PREN ~42) provide the corrosion resistance needed for continuous seawater service. For subsea and injection applications, Super Duplex is typically specified.
What is NORSOK M-710 and why does it matter for offshore valves?
NORSOK M-710 is a Norwegian offshore standard specifying qualification testing for non-metallic sealing materials (elastomers and thermoplastics) used in valves and other equipment on offshore installations, particularly on the Norwegian Continental Shelf. It tests resistance to high-pressure gas decompression, chemical resistance to hydrocarbons, and sour gas exposure. NORSOK M-710 qualification is required by most operators on the Norwegian Continental Shelf and is increasingly specified globally for FPSO and offshore topsides applications.

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Marine & Offshore Service Valves — Duqm

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Standards

API 6D
NORSOK M-710 (Elastomer qualification)
DNV-OS-D101 (Marine systems)
Lloyd's Register
NACE MR0175 / ISO 15156
API 607 (Fire test)
ASME B16.34
ISO 14313

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