Materials & Testing
The main materials of construction for various components of the Subsea Arch System are as follows:
Pressurised Steel Tanks or Foam Core (Co-polymer or Syntactic)
Tough Polyurethane Elastomer Skin or High Density Polymer Shell
High strength structural steel
Parallel Fibre Polyester or Kevlar in a tough, abrasion resistant sheath, chain or wire rope
High strength structural steel frame
High density ballast system (e.g.lead, iron ore, concrete)
Coating System to NORSOK M-CR-501
Specifications + Cathodic Protection using Zn-Al-In Anodes
The testing conducted on the Subsea Arch can be split into two categories:
- Buoyancy & Weight control
- Functional testing
In order to ensure that the Subsea Arch will generate the specified buoyancy all foam components are subject to a rigorous programme of qualifiaction and process control testing including the following:
- Density checks
- Hydrostatic crush pressure testing
- Water absorption testing
- Buoyancy loss checking
In addition to this, carefully controlled weight control procedures are followed during fabrication of the steel frame structure, clamps, mooring system and anchor base.
Function Testing of the subsea arch systems includes the following:
- Weigh all components
- Fit-up and assembly of all components (including padeyes, shackles, clamps in arch, risers in clamp etc)
- Load testing of padeyes
- load testing of mooring system
- Axial load test of clamps
As the arch structure and gravity bases may be large both dimensionally and in weight, delivery to the final destination may require special transport and logistical arrangements.
Our in-house shipping/export department are able to arrange quayside load outs, vessels and trans-shipments and final delivery together with all necessary Customs and Delivery paperwork formalities necessary to ensure this is a smooth operation.
This means clients can be assured that deliveries can be made even to the remotest parts of the world.