Technical Library
Here we bring together Irwin's core certifications, technical insight, process notes and downloadable resources — to help you understand our engineering capability and quality commitment in depth.
Certifications & Credentials
Classification-society certified
ABS Product Design Assessment certificate
Design capability for international marine projects, meeting demanding offshore-engineering compliance
ABS Manufacturing Assessment Certificate
A world-class pipe-production quality-control system that keeps products durable and consistent over the long term
Classification-society-approved welding procedures
ABS-approved Welding Procedure Specification
Suited to every industrial-pipe welding scenario, with mature procedures for the most demanding conditions
BV-approved Welding Procedure Specification
A world-class pipe-production quality-control system that keeps products durable and consistent over the long term
DNV-approved Welding Procedure Specification
Following globally recognised welding standards, capable of high-end international pipe projects of every kind
ISO triple-standard management-system certification
ISO 9001 Quality Management System
Standardised quality control end-to-end, keeping every production batch stable and controlled
ISO 14001 Environmental Management System
Clean, compliant production that balances quality with environmental responsibility
ISO 45001 Occupational Health & Safety Management System
Safe, controlled production and delivery throughout, for efficient and reliable project execution
Key Technical Figures
over 15 years
50%
DN50+
20%–30%
5 years
2–3 minutes
100%
Worldwide
Technical Articles
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Polyethylene (PE) Lining, A Cost Effective and Robust Solution for Sulfuric Acid Corrosion Protection in SOX Scrubbers
USD 1 Million Plus for a BWTS with Cheap Galvanized Pipes?
Another Complete Seawater Cooling System Refurbished Within 72Hours
10 Year Replacement Guarantee on Ballast Water Treatment System (BWTS) Pipes Fabricated and Coated by Irwin Marine Services.
Great Article on Irwin Marine Services in Splash 24/7
Renewal of DN400 PE Coated Seawater Pipe in Two Days
PE-Lined Pipe Production for Yiu Lian Dockyards
Irwin Marine Services satisfy demand for Polyethylene (PE) Lined Pipes with local production capability – initially at Yiu Lian Dockyards Shekou, China
Repair of an Overboard Pipe at Anchorage (Ship Repair)
Irwin Group Technical Update
Is Pipe Refurbishment a Better Option than Pipe Renewal at China Dockyards?
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Downloads
"As Good as New": a technical feasibility and implementation guide to refurbishing old seawater pipe
Automet Digital-Twin Survey: cutting drydock downtime by more than 50%
PE-Lined Steel Pipe Technical Manual: from material principles to "zero on-site hot work" process control
Marine Exhaust Gas Cleaning System (EGCS Scrubber) Pipe Compliance Guide
Marine Seawater Pipe: Refurbish vs Replace — a Life-Cycle Cost Comparison
Process & System Notes
The Automet® pipe design & survey system
Automet® is an integrated design, survey and reporting system built specifically for marine piping — for prefabrication, installation and repair.
Core functions:
- Generates a 3D digital-twin model of the pipe layout, greatly simplifying design and pre-assembly verification
- Reduces on-site rework, significantly saving drydock time and retrofit cost
Typical workflow:
- Import CAD drawings or pipe design parameters
- Build a complete 3D digital-twin model
- Survey spool axes and flanges with a Leica total station
- Auto-generate QC reports annotated with fabrication tolerances
- Precise factory prefabrication and first-time on-site fit
Value in use:
- Dimensional and flange-alignment checks in 2–3 minutes per spool
- One-click generation of a standard-format 3D digital report
- Supports on-site survey at any port worldwide, with remote factory prefabrication and delivery
♻️ PE-lining refurbishment — process highlights
Old pipe is restored by rotary (rotomoulded) lining, recovering corrosion protection to a new-pipe standard.
- Reusing the parent pipe greatly reduces steel consumption and carbon
- Refurbished in place, matching the existing flange interfaces 100% with no change to the pipe layout
- A 5-year drydock warranty on completion, to the same standard as new pipe
- A lining design life of over 15 years
- The cost advantage is especially clear on large-bore pipe
- Particularly suited to large-bore seawater-cooling and ballast lines on 10–16-year-old vessels
- Lower cost than new fabricated-and-coated pipe 30%–50%
- A far shorter schedule than full replacement plus on-site coating
Technical Q&A
PE lining · refurbishment · survey · delivery
Carbon steel, stainless and alloy steel — with elbows, tees, reducers, basket strainers and other complex shapes made to your drawings.
2 mm to 10 mm, tailored to pipe diameter and service (seawater, chemicals, abrasion).
Thorough washing, de-rusting and blasting to remove old coating and corrosion, then re-lining with PE or recoating to ensure proper adhesion.
No. It is non-contact and done with the pipe in service, without disrupting normal vessel or plant operation.
ABS (PDA), DNV and BV welding-procedure approvals; all shipped pipe comes with certificates meeting classification-society requirements.
Up to DN1600 (63 inch) — large-bore refurbishment and PE lining are among our strengths.
Better corrosion and abrasion resistance than new carbon-steel pipe, a service life over 15 years, at just 40-50% of new-pipe cost.
No. It is 100% factory-prefabricated, all-flanged, with zero on-site hot work.
2–3 weeks after survey for standard projects; for urgent orders as fast as 36 hours (e.g. a DN750 elbow/tee) or 6–8 days (survey in Hong Kong → delivery from Shenzhen).
We manufacture in our own Shenzhen workshop and deliver China-factory pricing to your vessel at any port worldwide; pipe refurbishment runs about 40–50% of new-pipe cost. A free assessment is available.
PE-lined steel combines the strength of steel with the corrosion resistance of PE — water absorption below 0.01% (FRP above 1%), little delamination, and better resistance to seawater and dilute sulphuric acid.
Contact us via the website form, email or phone. Provide pipe specifications (diameter, length, quantity), material requirements, whether it is refurbishment, and the delivery location — we'll reply with a detailed quote within 24 hours.
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