High-Precision Prefabricated Pipe & Seawater Corrosion-Protection Solutions
One-stop, hot-work-free prefabrication, refurbishment and replacement of seawater piping for shipowners and shipyards worldwide — 100% first-time fit, Automet® digital-twin survey, fewer drydock days and zero hot work on board.
DIN and JIS marine pipe-fitting standards, backed by classification-society approval.
Built on Firsts
First PE rotolining company in China
Pioneer of rotomoulded lining
First with an ABS-approved product
Classification-society certified
First to patent pipe refurbishment & re-coating
Proprietary, patented technology
First in China with Automet FAB digital-twin technology
A first-mover in digital survey
Automet Surveys Completed
In 2025 we completed 160 Automet® digital-twin surveys across 48 ports in 28 countries. Every spool is precision-built at our Shenzhen factory and shipped directly to the vessel's next port of call — no local fabricator required. The accurate data and reliable delivery you need: we provide both.
Why Choose Irwin
Irwin is a specialist in carbon-steel pipe prefabrication and corrosion-resistant lining, serving shipowners and shipyards across Greater China and worldwide. We deliver one-stop solutions — polyethylene (PE) lining, spool prefabrication and internal/external surface coating. With large-scale production and rigorous quality control, we respond quickly to client drawings and project requirements, provide free quotations and technical support, and deliver to classification-society standards even on tight schedules.
50-60%
The China price, worldwide
ABS Certified
Internationally classification-approved
5-Year Warranty
Drydock-to-drydock guarantee
100% Prefabricated
No on-site hot work
First-time fit on installation — no rework risk.
Product Advantages
Core Services
Carbon-Steel Pipe Fabrication
Carbon-steel, stainless and alloy marine spools, CNC-cut and precision-welded to meet complex pipework geometries.
PE Lining
Rotary-lining for complex pipework above DN50 — extends service life by over 15 years, with seamless corrosion resistance.
Re-lining of Existing Pipe
Refurbishment at around half the cost of new pipe, with a 5-year drydock warranty — low-carbon and matching new-pipe performance.
3D Survey / Automet®
High-precision laser scanning and digital-twin modelling enable hot-work-free prefabrication and first-time fit on installation.
View all service details
Case Studies
Türkiye FSRU Regasification System
On-site survey in Brazil → fabrication in China → installation in Türkiye. Won on quality and cost, with zero deviation on the PE-lined seawater pipework.
Container-Ship Central Cooling Pipe Replacement
Fully workshop-prefabricated with no on-site work — first-time fit on installation, cutting the owner's project cost by 55%.
Large-Bore Seawater Pipe Breakthrough
Digital survey straight to prefabrication, with no need to replicate the old pipe — fit-up efficiency up 40%, an industry-first solution.
Accreditations
ABS Certified
DNV Certified
BV Certified
ISO Certified
33 patents — industry-leading technical capability.
Global Service
A modern, fully-equipped PE-lining factory in Shenzhen
Client Testimonials
“Every prefabricated spool fitted first time at a 100% fit, with zero rework — the entire central-cooling renewal was completed in just 5 days, where the traditional method needs at least two weeks.”
“Irwin's patented refurbishment process brought our badly corroded seawater pipework back to better-than-new at less than half the cost of replacement — and the spools were installed without taking the vessel into drydock.”
“For the first time, we completed complex DN800 large-bore pipework with no on-site tack welding at all — every spool surveyed by Automet digital twin and bolted straight into place, transforming how we plan large-bore renewals.”
Ready to lower your pipe-replacement costs?
Contact us for a free initial assessment, or book a technical discussion directly with David Schaus.
Frequently Asked Questions
PE-lined carbon-steel seawater pipe — the questions buyers ask most.
Who supplies PE-lined carbon-steel seawater pipe with external blast and paint?
Irwin Group prefabricates PE-lined carbon-steel seawater pipe with external blast and paint at its Shenzhen workshop. It is ABS Product Design Assessment (PDA)-approved, with DNV, BV and ISO 9001/14001/45001 certification and ABS/DNV/BV-qualified welding procedures, supplies DN50–DN1600, and delivers worldwide with 100% first-time fit using its Automet digital-twin survey.
What is PE (rotational) lined seawater pipe and why use it?
PE-lined seawater pipe is carbon-steel pipe internally lined with rotational-moulded polyethylene for corrosion and abrasion resistance in seawater service. It gives a service life of over 15 years with a 5-year warranty, and the spools are prefabricated so there is no on-site hot work.
Is pipe refurbishment cheaper than renewal at a China dockyard?
Yes. Irwin’s patented refurbishment re-lines existing seawater pipe at roughly half the cost of new-pipe replacement while restoring better-than-new corrosion performance, and is available at China dockyards.
How fast can prefabricated PE-lined spools be delivered?
As fast as 36 hours for emergency orders and 2–3 weeks for standard projects. Spools arrive prefabricated and bolt up on arrival with zero on-site hot work.
What pipe sizes and certifications does Irwin offer?
DN50 to DN1600. Irwin is ABS Product Design Assessment (PDA)-approved, with DNV, BV and ISO 9001/14001/45001 certification and ABS/DNV/BV-qualified welding procedures.
Where is Irwin Group based?
Irwin Group has its office in Hong Kong and a PE-lining and pipe-fabrication workshop in Shenzhen, China, and delivers worldwide.