Off-Shore Topside Forged Flanges Product Introduction

Integrated advantages combining medium-large scale comprehensive manufacturing capability and specialized forging-focused production capacity, for tender / datasheet / proposal use.

Product Introduction

Overview

This product range covers high-integrity forged flanges and associated custom forgings dedicated for FPSO, offshore platform topside modules, floating LNG facilities and marine process piping systems. The manufacturing base integrates comprehensive heavy-fabrication capacity and specialized forging workshop, delivering flexible solutions for both large-volume EPC turn-key orders and small-batch high-alloy special-spec orders. Full in-house workflow includes billet cutting, open-die / closed-die forging, heat treatment, CNC machining, full-scope NDT, PMI positive material identification and CNAS-accredited mechanical-chemical laboratory testing.

Qualifications & Compliance

• Material process qualification: NORSOK M-650 (for topside offshore service, covering austenitic, duplex / super-duplex, nickel-alloy grades)
• Classification society factory approvals: ABS, LR, BV; DNV-GL capability available upon project requirement
• Pressure-equipment directives: PED 2014/68/EU, TSG China pressure-component certification
• Management-system certificates: ISO 9001, ISO 14001, ISO 45001
• Document delivery: EN 10204-3.1 / 3.2 inspection certificates, full heat traceability, PMI reports, Charpy impact test records, complete NDT documentation
• Product liability insurance available for marine-related deliveries (excluding USA & Canada territories subject to policy wording)

Material Scope

• Austenitic stainless steel: F304L, F316L, F321, F316Ti, F317L
• Duplex & super-duplex stainless steel: F51(S31803), F60(S32205), F53(S32750), F55(S32760), F44(254SMO)
• Nickel-base alloys: N06625, N08825
• Carbon & low-temperature alloy steel: A105, LF2, F11, F22

Product Scope

• Flange types: Weld-neck, slip-on, blind, threaded, lap-joint, custom special forged flanges
• Standards: ASME B16.5, ASME B16.47, EN 1092-1, API 6A
• Pressure class: Class 150 up to Class 2500
• Supplementary deliverables: Matching forged fittings & custom forgings for integrated piping package supply

Application Boundaries

✅ Suitable for: FPSO topside decks, offshore platform above-water process pipelines, cooling-seawater circuits, floating-LNG topside systems, marine utility piping.

❌ Not applicable for: Subsea / sub-sea production components (NORSOK M-630 qualification not available), API-6A PR 2 fatigue-rated well-head flanges.

Core Combined Advantages

1. Flexible order adaptability Support large EPC package orders for full piping kits (flanges + fittings + forgings), as well as small-batch multi-spec high-alloy special-material orders with competitive lead-time & commercial terms.
2. Full in-house manufacturing & testing All critical processes (forging, heat-treatment, machining, NDT, mechanical / chemical lab test) are performed internally. No heavy reliance on external subcontracting; zero repair-weld policy for critical offshore forgings to secure material integrity.
3. Broad capacity envelope Closed-die forging capacity up to 300 kg; open-die forging up to 1,200 kg for austenitic grades, up to 800 kg for duplex / super-duplex grades. Larger heavy-ring-rolled forgings available for major-project requirements.
4. Complete offshore-oriented documentation package Deliver NORSOK M-650 QTR records, classification-society survey-ready documents, full traceability, PMI & low-temperature Charpy impact reports ready for third-party witness inspection.
5. Project-risk mitigation Dual-mode production model balances large-factory financial stability & specialized-forging-plant agility for high-alloy small lots. Product-liability insurance is available for marine-scope shipments.