Boiler tube processing
Boiler tubes rarely arrive on site in mill lengths. We supply them ready to install – cut to length, bevelled, bent and marked, exactly as your drawing specifies.
What does boiler tube processing cover?
Boiler tube processing covers every step that turns a tube in mill length into a part ready to install: cutting to size, weld preparation by bevelling, cold bending to radius, swaging or expanding the ends, drilling and marking. What matters is that tolerances, bevel angle and residual wall match the drawing and the applicable code – otherwise the tube does not fit on site or the weld is not accepted.
Scope of supply & execution
| Item | Detail |
|---|---|
| Basis | Parts list, drawing or isometric with lengths and bevel angles |
| Cutting to length | to fixed length, usual tolerance ± 1 mm, tighter on request |
| Weld preparation | bevelling to EN ISO 9692, 30° or 37.5°, with root face as specified |
| Bending | cold-bent from 1.5 × D, residual wall verified against specification |
| End working | swaging, expanding, upsetting or calibrating to drawing |
| Materials | P235GH, P265GH, 16Mo3, 13CrMo4-5, 10CrMo9-10, X20, P91, heat-resisting |
| Marking | item number, heat and material, durable and traceable |
| Testing | dimensional and visual inspection, wall thickness measurement, endoscopy on request |
| Documentation | 3.1 or 3.2 certificate to EN 10204, parts and dimension list |
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
- Tube sets for boiler outages with a tight shutdown window
- Membrane walls and tube banks in new build
- Economiser and superheater packages as a kit
- Replacement tubes after a tube failure, marked by item number
- Tube sets for heat recovery boilers and waste incineration
- Pre-assembled units for erection under time pressure
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.
Boiler tube processing – frequently asked questions
Which bevel angle is the right one?
The welding procedure decides, not habit. In boiler work 30° and 37.5° are usual, each with a defined root face. Give us the WPS or the bevel angle from the drawing and we supply to match.
How accurately can tubes be cut?
± 1 mm to fixed length is usual. Tighter tolerances are possible but must be stated in the order – they cost time and cannot be produced afterwards.
Are tubes marked by item number?
Yes, on request with the item number from your parts list, in addition to heat and material. That saves sorting on site and keeps the link to the certificate traceable.
Is traceability kept after cutting?
Yes. The heat marking is transferred before cutting and reapplied to every section. Each piece therefore stays linked to its certificate to EN 10204.
What do you need for a quotation?
Parts list or drawing with lengths, tube size and wall thickness, material grade, bevel angle or WPS, the marking you want and the required certificate to EN 10204.
Boiler tube processing – request a quote
Drawing, material and quantity are enough – we come back with price and lead time.