Site measurement & material take-off on site: how we plan your pipeline
A good pipeline does not begin in the warehouse but on site. During the survey we record everything that matters for material, schedule and budget – and clarify the questions that would otherwise only surface during installation.
Why on site and not by phone
Drawings and as-built conditions almost always differ. A line has been rerouted, a nozzle sits ten centimetres further left, a beam is in the way. Order to drawing on that basis and you receive material that does not fit – and you find out on installation day.
A site survey replaces estimation with measurement. You receive a sound basis for budget and order before the first pipe is ordered.
What we record
| Recorded | Purpose |
|---|---|
| Routing and lengths | Basis for pipe quantities, fixed lengths and fitting pieces |
| Connections and installation situation | Flange form, rating and mating part on the existing plant |
| Medium, pressure and temperature | Material selection, rating and wall thickness |
| Space and obstructions | Bend radii, fitting selection, possible special parts |
| Support points and building interfaces | Position of fixed and sliding supports, hangers |
| Insulation and trace heating | Clearances, support selection, clamp sizes |
Sizing and bill of materials
Based on medium, pressure rating and temperature we define nominal sizes, materials and ratings. From this the bill of materials is produced – completely: pipes, bends, tees, reducers, flanges, gaskets, bolts, supports.
It is precisely the small items that determine the installation date. A line with 40 metres of pipe delivered but no gaskets is no more finished than one without pipe. More in choosing the right gasket and bolts and studs for flanges.
Supports, bearings and hangers
A pipeline expands. With 100 metres of steel pipe and a temperature difference of 100 kelvin, that is over a hundred millimetres of change in length – which has to go somewhere.
- Fixed points give the line a defined anchor and transfer forces into the structure.
- Sliding and guide supports allow expansion along the axis while carrying the weight.
- Hangers take the load from above where no support from below is possible.
Where each support belongs follows from weight, thermal expansion and operating temperature – not from intuition. We define the positions and supply the matching components.
From survey to quotation
| Step | Result |
|---|---|
| 1. Site visit | As-built survey, measurement, technical clarification |
| 2. Sizing | Material, nominal size, rating, support concept |
| 3. Bill of materials | Every item individually, nothing forgotten |
| 4. Costing | Traceable budget, item by item |
| 5. Delivery | Machined and picked in installation sequence |
What you can prepare
To make the visit efficient, the following help in advance: existing isometrics or P&I diagrams, details of medium, operating pressure and temperature, the required certificate type to EN 10204 and the planned installation date. If anything is missing, we clarify it together on site.
More on our scope of services under services. On documentation: inspection certificate 3.1 or 2.2.
Frequently Asked Questions
Why a site survey instead of working from drawings?
Drawings and as-built conditions almost always differ. Ordering to drawing means receiving material that does not fit, and finding out on installation day. A survey replaces estimation with measurement.
What is recorded during the survey?
Routing and lengths, connections and installation situation, medium, pressure and temperature, available space, support points, and insulation and trace heating.
What are fixed and sliding supports for?
Fixed points give the line a defined anchor and transfer forces into the structure. Sliding and guide supports allow thermal expansion along the axis while carrying the weight.
How much does a steel line expand?
With 100 metres of steel pipe and a temperature difference of 100 kelvin it is over a hundred millimetres of change in length. This expansion must be absorbed by the arrangement of supports.
What should I have ready for the visit?
Existing isometrics or flow diagrams, details of medium, operating pressure and temperature, the required certificate type to EN 10204, and the planned installation date.
Do you need exactly these parts?
Grade, size, pressure rating and quantity are enough – you usually receive your quote the same day, with an inspection certificate 3.1 on request.
Request a quote