Pipe spools
Prefabricated piping sections to your drawing or isometric – welded, tested and delivered ready to install. This moves welding work from the site into the shop and cuts erection time considerably.
What is a pipe spool?
A pipe spool is a prefabricated section of a pipeline in which pipe, bends, fittings and flanges are welded into one transportable assembly. It is made to an isometric or drawing, tested and delivered to site as a finished unit, where it only has to be lifted into place and bolted up.
Scope of supply & execution
| Item | Detail |
|---|---|
| Basis of manufacture | Isometric, drawing or dimensioned sketch |
| Dimensions | DN 15 to DN 1200, wall thickness as designed |
| Connection | Butt weld to EN ISO 9692, flange to EN 1092-1 or ASME B16.5 |
| Welding | TIG, MMA or MAG to qualified procedures (WPS/WPQR) |
| Fittings | Bends to EN 10253, tees, reducers, caps |
| Testing | Visual inspection, NDT as specified, pressure test with report |
| Documentation | 3.1 or 3.2 certificate to EN 10204, weld map, test reports |
| Surface | bare, blasted, primed or pickled and passivated |
| Marking | Spool number to isometric, batch and heat traceable |
Materials we supply for this
The grade follows from medium, temperature and pressure. Each grade has a data sheet with composition, properties and standards.
Typical fields of use
- Process lines in refineries and petrochemical plants
- Main steam and feedwater lines in power plants
- Connecting lines between boiler, header and turbine
- Cooling and seawater circuits in shipbuilding
- District heating lines and transfer stations
- Revamps and outages with a tight time window
The records you receive
Inspection certificate 3.1 or 3.2 to EN 10204
Batch-related test results for every pressure-bearing item, countersigned on request.
Non-destructive testing
Visual, penetrant, magnetic particle, ultrasonic or radiographic testing of the welds as specified.
Pressure test
Hydrostatic test to the applicable code and drawing, with test report.
Traceability
Batch and heat number of every item remain traceable through the documentation.
From drawing to delivery
1. Drawing or sketch
Send us the drawing, isometric or bill of material – a hand sketch with dimensions is enough to start.
2. Agree material and code
We settle grade, standard, pressure rating and the required certificate with you.
3. Quotation
You receive a quotation with price, execution and a firm delivery date.
4. Delivery with documentation
The component arrives ready to install, with certificates and test reports.
Frequently asked questions about Pipe spools
What is the difference between a pipe spool and a pipeline?
The pipeline is the finished system in the plant. The pipe spool is a single prefabricated section of it – a transportable assembly of pipe, bends and flanges that is welded and tested in the shop and only erected on site.
What documents do you need for a quotation?
An isometric or drawing with dimensions, the material grade, the pressure rating and which certificate to EN 10204 is required. If no isometric exists, a dimensioned sketch is enough for a first calculation.
Why prefabricate instead of welding on site?
In the shop you can weld, test and document under controlled conditions. That reduces the share of field welds, shortens erection time and simplifies quality assurance – especially for creep-resistant materials with preheating and post-weld heat treatment requirements.
Are the welds tested?
Yes. Visual inspection is always included. Beyond that we agree the non-destructive testing to your specification – penetrant, magnetic particle, ultrasonic or radiographic – and the pressure test with report.
Which materials do you supply pipe spools in?
Unalloyed boiler steel such as P235GH, creep-resistant grades such as 16Mo3, 13CrMo4-5, 10CrMo9-10 and P91, austenitic stainless such as 1.4404 and 1.4571, duplex 1.4462 and CuNi 90/10 for seawater.
Pipe spools – request a quote
Drawing, material and quantity are enough – we come back with price and lead time.