Offshore Steel Products

Offshore steel products must withstand the most demanding environmental conditions - constant salt spray, extreme wave loads, and corrosive atmospheres. At Qingdao Tianhua Yihe Metal Fabrication (qdthyhmetalfab.com), we fabricate custom offshore structural components, platform sections, equipment supports, and safety infrastructure for the oil and gas industry. Our fabrication processes support DNVGL standards where required, with full weld traceability, NDT testing, and coating systems rated for offshore environments.

Core Specifications

Material: Q355B, AS/NZS 3678 Grade 350, offshore-grade steel

Product types: Platform sections, equipment supports, safety structures

Welding: SAW, MIG, TIG - procedures qualified to ISO 15614

Testing: UT, RT, MT, PT available

Coating: HDG + offshore epoxy system (ISO 12944 C5-M)

Standards: ISO 9001:2015; DNVGL-OS-C101 manufacturing supported with third-party inspection arranged on request

Products in This Category

Offshore Platform Structural Components

Equipment Supports and Skid Bases

Safety Infrastructure for Offshore Facilities

Offshore Steel Assemblies with Full NDT

Custom Offshore Fabrication to Classification Standards

Manufacturing Capabilities

Offshore fabrication requires the highest level of quality control. We maintain weld procedure qualifications (WPS/PQR) to ISO 15614, welder qualifications per ISO 9606, and offer full NDT (non-destructive testing) including UT, RT, MT, and PT. Our coating systems for offshore products follow ISO 12944 C5-M specifications, with HDG base coat plus multi-layer epoxy/polyurethane or glass-flake epoxy systems.

Quality Assurance

Full material traceability from mill to finished product (heat numbers + MTCs)

Weld procedure qualification per ISO 15614 with WPS/PQR documentation

NDT reports (UT/RT/MT/PT) provided by qualified technicians

Coating verification to ISO 12944 C5-M with DFT measurement records

Third-party inspection (DNV / Lloyd's Register / classification societies) arranged on request

Frequently Asked Questions

Q: Do you provide full material traceability?

A: Yes, all material is traceable from mill to finished product. We provide MTCs, heat numbers, and traceability documentation with every shipment.

Q: Can you meet DNVGL standards?

A: Yes, we can manufacture to DNVGL-OS-C101 and other DNVGL standards. Our quality system supports third-party inspection by DNV, Lloyd's Register, or other classification societies.

Q: What NDT services do you offer?

A: We offer UT (ultrasonic), RT (radiographic), MT (magnetic particle), and PT (dye penetrant) testing, with reports provided by qualified NDT technicians.

Related Pages: Marine & Offshore Products > Mooring Plates | Structural Steel Fabrication | Home

Ready to Start Your Project?

Send your offshore drawings and inspection requirements — we'll confirm NDT scope, coating, and certification within 2 hours.

Email: andywang@qdthyhmetalfab.com | WhatsApp: +86 138 6398 9651 | Tel: +86 138 6398 9651

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