Rule 01
Fix the source before the number
A dimension with no standard and revision attached cannot be compared to anything. The source is recorded first, and a row without one is reported as missing rather than filled in.
Technical Resource
Scaffolding Pipe Dimensions Chart
A dimensions chart is only decision-grade when every row names the standard and revision it came from, the dimensional basis it uses, its units, and where its tolerance is sourced. Mixing nominal outside diameter, actual measured diameter, wall and length across different standards in one unlabelled table is the most common way a scaffold tube order goes wrong — the numbers look comparable and are not. The normalizer below tags each entry with its source before it will compare anything.
Free, no-obligation technical review
Information current as of
Send these inputs
- Standard + revision
- Outside diameter + unit
- Wall thickness + unit
- Length + unit
- Tolerance source
- Finish allowance
- Coupler standard
- Destination / named place
Working technical tool
Scaffold Tube Dimension Normalizer
Enter the dimensions you have and tag each one with its source. The normalizer holds nominal and actual values apart, refuses to convert units on your behalf, generates no tolerance it was not given, and reports what is missing rather than filling it in. It produces a comparison-safe row and a copyable specification line.
Step 1 — Dimensions and their sources
Outside diameter *
Wall thickness *
Length *
Values are recorded exactly as entered. Nothing is converted, rounded or defaulted, and no tolerance is generated. An unknown field is reported as missing.
Step 2 — Normalized result
Not yet normalized
Add the required fields to normalize this row.
Missing: Standard + revision, Outside diameter, Outside diameter unit, Outside diameter basis (nominal or actual), Wall thickness, Wall unit, Length, Length unit, Tolerance source, Coupler standard, Finish / coating. Nothing is defaulted in their place; the row is held as incomplete until each is supplied.
Missing fields (11)
- Standard + revision
- Outside diameter
- Outside diameter unit
- Outside diameter basis (nominal or actual)
- Wall thickness
- Wall unit
- Length
- Length unit
- Tolerance source
- Coupler standard
- Finish / coating
Conditions limiting comparison
- No tolerance source. Outside diameter, wall and length each carry their own permissible variation, set by the governing standard. Without a cited source the entries have no defined acceptance limits and cannot be marked comparable.
- No coupler standard. The interface is the reason the diameter matters — without the coupler reference, the outside diameter is being recorded but not checked against anything.
Normalized fields
- Standard + revision
- not stated
- Outside diameter
- not entered
- Outside diameter basis
- not stated
- Wall thickness
- not entered
- Length
- not entered
- Tolerance source
- not stated
- Coupler standard
- not stated
- Finish / coating
- not stated
- Unit system
- not stated
Comparison-safe
- Nothing yet — no field has a source behind it.
Not yet safe to compare
- Standard and revision — every dimension needs a source before it can be compared.
- Outside diameter — needs a value, a unit and a stated basis (nominal or actual).
- Wall thickness — needs a value and a unit.
- Length — needs a value and a unit.
- Tolerance source — the permissible variation for OD, wall and length.
- Coupler standard — the interface the diameter is checked against.
- Finish / coating — decides whether the presented diameter differs from the bare one.
Assumptions and method
- Values are recorded exactly as entered. Nothing is converted between units and no figure is rounded.
- Nominal and actual values are held in separate fields and are never averaged or treated as equivalent.
- No tolerance value is generated, inferred or defaulted. Where none is supplied, the dimension is reported as having no defined limits.
- No standard, grade, coating or destination is assumed on the buyer's behalf.
- A normalized row is a comparison aid. It is not engineering approval and does not establish that any scaffold is adequate for its access.
Copyable specification line
SCAFFOLD TUBE DIMENSION LINE Standard + revision: TO CONFIRM Outside diameter: TO CONFIRM (basis TO CONFIRM) Wall thickness: TO CONFIRM Length: TO CONFIRM Tolerance source: TO CONFIRM — no limits can be applied without it Coupler standard (interface): TO CONFIRM Finish / coating: TO CONFIRM Basis: nominal and actual values kept separate; no conversion and no tolerance inferred. Status: comparison aid only — not an engineering approval.Transfer this into the RFQ
The normalized row is carried into the enquiry form as the specification line above — nothing you entered is discarded.
Method, formula and data conditions
Six rules that keep a chart decision-grade
The method is not a formula — it is a set of conditions. Each rule below exists because breaking it produces a table that looks authoritative and is not. The unit system is whatever you state, and it is never converted silently.
Rule 02
Separate nominal from actual
A nominal figure is a designation. An actual figure is a measurement and only exists at a point in time, against an instrument. The normalizer keeps the two in different fields so they are never averaged together.
Rule 03
Attach the tolerance basis
Outside diameter, wall and length each carry their own permissible variation, set by the governing standard. The tolerance source is a mandatory field, because a dimension without one has no defined limits.
Rule 04
Account for the finish
A coating adds to the outside surface. Where one applies, the diameter the coupler meets is the presented diameter, not the bare one — and the two are recorded separately.
Rule 05
Check against the interface
The coupler standard is the interface reference. Chart data is only useful if the distinction between interface dimensions and product-standard tolerances is preserved end to end.
Rule 06
State what the chart is not
A normalized row is a comparison aid. It is not an engineering approval, not a certificates substitute, and not a claim that a scaffold built from the component is adequate.
Source hierarchy
The governing standard first — that is where dimensions and tolerances come from. The coupler standard next, as the interface reference. Manufacturer data only where an authorized source publishes it for the specific product.
Applicability
A chart row applies to the standard, edition and product form it was recorded from. Carried to a different standard or a different product form, the same numbers stop describing the same thing.
Limitations
No numerical tolerance, unit weight, load capacity or dimensional limit is published on this page. Each is set by the standard that governs your supply, and the page states the input to supply instead of asserting a figure.
Procurement-grade worked examples
Three situations that recur on scaffold tube enquiries
Each example shows the input, the method applied, the result, what it means, what it changes and how to verify it. No company, project or supplier data is used or implied.
1
Two offers, same stated diameter
Input
Two quotations both state a 48.3 mm outside diameter. Neither states a tolerance basis or the standard the figure came from.
Method applied
The normalizer holds both rows as outside diameter = 48.3 mm with an empty tolerance source. It refuses to mark them equivalent, because equality of a nominal value is not equality of a toleranced dimension.
Result
Comparison status: not comparable. Both rows return a missing-source warning against the tolerance field rather than a match.
Interpretation
The numbers agree; the dimensions do not yet exist as comparable quantities. Nominal equivalence says nothing about what the coupler will actually close on.
Decision impact
Buying on the nominal figure alone can produce tube that assembles differently from the sample the design was checked against.
Verification step
Ask both suppliers for the tube standard with its edition and the tolerance basis for outside diameter and wall, in writing, before comparing the offers.
2
A measured diameter against a nominal design figure
Input
A site measurement records an outside diameter of 48.4 mm on delivered tube. The design references a nominal 48.3 mm.
Method applied
The measured value is recorded in the actual field and the design figure in the nominal field. The normalizer will not treat the difference as a deviation, because no tolerance limits have been supplied to judge it against.
Result
Comparison status: needs a tolerance source. The difference is displayed as an unresolved quantity, not as a pass or a fail.
Interpretation
Whether 48.4 mm is within permissible variation depends entirely on the limits in the governing standard and the instrument used. Neither is present yet.
Decision impact
A site decision made on the raw difference — accepting or rejecting the consignment — would be made without the limits that define acceptance.
Verification step
Take the permissible outside-diameter variation from the accepted tube standard and the measurement uncertainty of the instrument, then compare the measured value against those limits.
3
Two standards described by one grade
Input
Two tube offers are described only by a steel grade designation. The dimensional and tolerance regimes behind them are not stated.
Method applied
The normalizer treats the grade as one field. It leaves the standard/revision field empty rather than inferring a standard from the grade.
Result
Comparison status: not comparable. The row is complete on grade and incomplete on standard, dimensions and tolerance source.
Interpretation
A grade is a strength basis. It does not carry dimensions, tolerances or a product form, so two offers matching on grade have not been shown to match on anything the coupler meets.
Decision impact
A shortlist built on grade alone can drop an offer that was dimensionally correct and keep one that was not.
Verification step
Require the full standard and revision, plus the outside diameter, wall and length with their tolerance bases, from each supplier.
None of the examples states a tolerance value, a unit weight or a dimensional limit. Those are set by the standard governing your supply, and each example shows the verification step that resolves it rather than a figure this page cannot evidence.
Standards and tolerance context
Which document supplies which part of the row
Dimensions, tolerances and interface requirements come from different documents, and a chart goes wrong the moment they are treated as one. The tables below keep them apart and state the evidence each line depends on.
What each line of a chart depends on
Every row names its applicability and the verification requirement behind it.
| Line | What it governs | Verification requirement | RFQ field |
|---|---|---|---|
| Tube product standard | Governs the tube as a product — its dimensional regime, tolerances and testing. | Buyer cites the standard and edition the design assumes. | Standard / revision field |
| Coupler standard | The interface reference. It defines coupler requirements — it does not supply every tube dimension. | Buyer names the coupler standard and revision. | Coupler standard field |
| Nominal outside diameter | A designation used to reference the size. It is not a measured value and carries no limits on its own. | Buyer states the nominal figure and its unit. | OD field (nominal) |
| Actual outside diameter | A measurement against an instrument at a point in time; it only means something against stated limits. | Buyer states the measured value, unit and instrument. | OD field (actual) |
| Tolerance basis for OD and wall | Sets the permissible variation. Without it, a stated dimension has no defined acceptance limits. | Buyer supplies the tolerance source from the accepted standard. | Tolerance source field |
| Length and its basis | Length is measured against a stated basis; cut lengths follow the design geometry rather than stock figures. | Buyer states the length, unit and the basis it is measured to. | Length field |
| Coating and presented diameter | A coating adds to the outside surface, so the diameter presented to the coupler differs from the bare one. | Buyer states the finish and confirms the coupler range against the presented diameter. | Finish field |
| Unit weight and mechanical values | Published by the governing standard against stated conditions. Not repeated here as chart values. | Buyer reads them from the accepted document for the specific supply. | Verification requirement |
Tolerance and form — where values are deliberately absent
Suppressed values are replaced by the exact input needed to resolve them.
| Parameter | Decision implication | Verification requirement | RFQ field |
|---|---|---|---|
| Outside diameter tolerance | The permissible variation on the diameter the coupler closes on. | Not published on this page. Take from the accepted tube standard for the specific supply. | Tolerance source field |
| Wall thickness tolerance | The permissible variation on wall, which the standard defines on its own basis. | Not published on this page. Take from the accepted tube standard. | Tolerance source field |
| Length tolerance | The permissible variation on length, which depends on how the length is supplied. | Not published on this page. Take from the accepted standard or the agreed cut schedule. | Length field |
| Straightness and ovality | Form variations that affect assembly even where the diameter is within limits. | Not published on this page. Confirm which parameters the accepted standard specifies. | Verification requirement |
| Interface dimensions | The dimension set the coupler is designed around, from the coupler standard. | Take from the coupler standard and confirm against the tube as presented. | Coupler standard field |
| Coating build | How much a coating adds to the presented outside diameter. | Not published on this page. Confirm against the coating standard and the coupler range. | Finish field |
Evidence warning
Numerical chemistry, mechanical properties, tolerances, coating thickness or mass, unit weight, load capacity and dimensional limits are not printed on this page. Each is published by the standard and edition governing your supply, and each has to be read from that document for the specific material. Where a figure is needed to proceed, the row above states the input to supply instead.
Verification and misuse controls
What has to be confirmed, and how the chart gets misused
The first table is the documentation a dimension line depends on — what it verifies, who issues it, when it is needed and what breaks without it. The second is the six ways a dimension chart is most often read wrongly, and the control that prevents each.
| Document / test | What it verifies | Source / issuer | When required | Dependency |
|---|---|---|---|---|
| Mill test certificate | The standard, edition and grade the tube was made and tested to | Certificate naming the accepted document, traceable to the supplied lot | Before quotation is finalised | The chart row cannot be tied to the material actually offered. |
| Dimensional record | Measured outside diameter and wall against their tolerance bases | Measured record taken against a stated instrument | Before dispatch | A nominal figure stands in for a measurement with no limits attached. |
| Tolerance source | Which document supplies the permissible variation being applied | Citation of the standard, edition and clause in the accepted document | Before comparison is used | Two rows are compared against different limits without anyone noticing. |
| Coupler specification | The coupler standard, revision and the size range the design depends on | Coupler specification checked against the presented diameter | Before order placement | The interface is assumed from matching nominal figures. |
| Finish documentation | The finish applied and, where coated, the coating standard that applies | Finish record naming the standard and method where a coating applies | Before dispatch | The presented diameter differs from the one the coupler range was checked against. |
| Design outputs | The dimensions and tolerances the scaffold design actually assumes | Design drawing or specification from the responsible engineer | Before quotation | The chart is complete but answering a question the design never asked. |
Common input errors and the control against each
1
Comparing nominal figures across standards
Nominal equivalence is treated as dimensional equivalence, so two rows are marked comparable when their tolerance regimes differ.
Keep the standard and revision attached to every row. The normalizer refuses a comparison while a tolerance source is missing.
2
Treating a measured value as a specification
A single site measurement becomes the acceptance criterion, when a measurement only means something against stated limits.
Record measured values in the actual field and compare them against limits taken from the accepted standard.
3
Averaging mixed units
Values entered in different units are combined without conversion, producing a figure that corresponds to nothing.
State the unit on every field. The normalizer flags a unit mismatch rather than converting silently.
4
Using length as a design dimension
A stock length is treated as the required length, so cut geometry is derived from what was available.
State whether the length is a stock figure or a design cut, and keep the design reference with it.
5
Ignoring the coating in the interface check
The coupler range is checked against the bare diameter when the tube arrives coated.
Record the bare and presented diameters separately and confirm the coupler range against the presented one.
6
Reading the chart as engineering approval
A normalized row is taken as confirmation that a scaffold is adequate, when it establishes nothing of the kind.
Keep the chart as a comparison aid and route adequacy questions to the responsible engineer.
When engineering review is required
A normalized chart row answers a dimensional question. It does not answer whether a scaffold is adequate for the access it provides, whether a load class is met, or whether an interface is safe in service. Those are engineering judgements that belong to the responsible engineer, and a chart — however well sourced — is not a substitute for them.
Product decision handoff
Where the dimensions chart hands over
A dimension row establishes what the tube is dimensionally. It does not choose the tube form. The related page below carries that decision, with its own boundary stated.
Type route
black scaffolding pipe supplier
Use where: Use where the uncoated tube form is the open decision and the requirement is to settle which tube the system is built around.
Boundary: The pipe form does not settle the coupler family or the scaffold design — those stay separate decisions.
What this handoff cannot tell you
Neither the chart nor the type route establishes load capacity, design adequacy or interface compatibility in service. Those come from the governing standard and the responsible engineer — the page states the input to supply rather than asserting a value it cannot evidence.
Related related tools and pages
Continue by the next task, not by a link list
Three listed destinations, grouped by what you would be trying to resolve. Take the one matching the question still open.
Compare against another member
GCC product × country routes
Destination input by market
Each market page sets out the commercial route for a scaffolding pipe enquiry into that country — destination, importer, documents, Incoterm and delivery point kept explicit rather than assumed. Ports, charges, transit times and delivery dates are quotation dependent and are not published here.
United Arab Emirates
Saudi Arabia
Qatar
Kuwait
Bahrain
OmanDelivery inputs
Named place, site access, offloading position and the window the project needs. Each is a field on the enquiry rather than an assumption made at quotation.
Document set
The documents each market requires are stated on the enquiry with their issuers, so the scope is quoted rather than negotiated after order.
Incoterms 2020
The rule is quoted with its named place and port. The Incoterm defines delivery obligations — it does not by itself settle title, payment terms, duty or customs clearance.
Expert insight
An interface-first dimensional check
Decision question
Which dimension matters first when checking scaffold-tube/coupler compatibility?
- Method
- Use the current coupler standard as the interface reference, then require tube dimensions and tolerances from the governing tube specification.
- Information date
Primary source
BSI Knowledge — BS EN 74-1:2022+A1:2025, Couplers for tubes
https://knowledge.bsigroup.com/products/couplers-spigot-pins-and-baseplates-for-use-in-falsework-and-scaffolds-couplers-for-tubes-requirements-and-test-procedures-1Scope, as published
Current BS EN 74-1:2022+A1:2025 governs couplers for scaffold tubes; chart data must therefore preserve the distinction between interface dimensions and product-standard tolerances.
Limitations
- The coupler standard does not supply every tube dimension or tolerance.
- Any numerical chart must be sourced row-by-row from an authorized standard or approved manufacturer data.
Buyer implication
Make standard/revision and tolerance source mandatory columns in the dimension chart.
Evidence-led buyer advantages
Buyer concern → evidence → outcome
Four concerns that come up on almost every dimension enquiry, and what actually resolves each one. No superiority claims — the resolution is a process, not a property of the steel.
01
Dimensions compared across standards without anyone noticing
Every row carries its standard, revision and tolerance source, and the normalizer refuses a comparison while any of them is missing.
A shortlist where the rows are genuinely comparable rather than nominally similar.
02
A measured value mistaken for a specification
Nominal and actual are separate fields, and the difference between them is held as an unresolved quantity until limits are supplied.
Acceptance decisions made against the limits the standard defines, not against a raw difference.
03
Mixed units producing a figure that means nothing
The unit is a stated field on every entry, and a mismatch is flagged rather than converted silently.
Calculations that resolve to a real quantity on a known basis.
04
An interface checked against the wrong diameter
The bare and presented diameters are recorded separately, with the coupler range confirmed against what it actually meets.
Couplers and tube that assemble as the design assumed, coating included.
Concern/Evidence or capability required/Procurement outcome
From enquiry to delivery
Six stages, and who owns each
Each stage names the owner, the input it needs, the evidence it produces, the risk of skipping it and the next action. The early stages belong to the technical side of the review, not to the supplier.
Stage 01
Source fixed
Owner: Buyer / technical reviewer
Required input
The tube standard and revision the dimensions will be recorded against.
Evidence / output
A named source for every row that follows.
Risk if missing
Rows collected from different documents and silently treated as one set.
Next action
Cite the standard and edition before entering any dimension.
Stage 02
Dimensions entered
Owner: Buyer / technical reviewer
Required input
Outside diameter, wall and length with their units, each tagged nominal or actual.
Evidence / output
A normalized set with the nominal/actual distinction preserved.
Risk if missing
A measured value recorded in a nominal field and later compared as though it were a designation.
Next action
Enter each value with its unit and its basis.
Stage 03
Tolerance source attached
Owner: Buyer / engineer
Required input
The document and clause supplying the permissible variation for each dimension.
Evidence / output
Dimensions that carry defined acceptance limits.
Risk if missing
A comparison run against limits nobody has actually cited.
Next action
Attach the tolerance source before using any comparison.
Stage 04
Interface checked
Owner: Buyer / technical reviewer
Required input
The coupler standard and size range, against the diameter the tube presents.
Evidence / output
A verified interface rather than an inferred one.
Risk if missing
Assembly stalls on site because the fit was read from nominal figures.
Next action
Confirm the coupler range against the presented diameter, coating included.
Stage 05
Commercial enquiry
Owner: Commercial department
Required input
Quantity with its unit basis, destination, and the Incoterm 2020 rule with its named place.
Evidence / output
A quotation request on a stated basis — price on request.
Risk if missing
A cost difference read as a commercial difference when the offers carry different obligations.
Next action
Hand the copyable specification line to the Scaffolding Pipes enquiry form.
Stage 06
Documents reconciled
Owner: Supplier / buyer
Required input
The document set the project requires, each with its issuer.
Evidence / output
Material arriving with documentation that ties back to the chart rows.
Risk if missing
A consignment that cannot be reconciled against the specification it was bought to.
Next action
Confirm the document scope and issuers on the enquiry.
Buyer FAQ
Post-decision questions
The questions that come up once the buyer has established that source-tagging, not the numbers themselves, is what makes a dimension chart usable.
1
Why can't two tubes with the same nominal diameter be compared directly?
Because a nominal diameter is a designation, not a dimension with limits. Two tubes can both be described as 48.3 mm and still differ in the permissible variation their governing standards allow. Until each row carries its standard, revision and tolerance source, the two figures are not comparable quantities — they only look alike.
2
Which dimension should be checked first for coupler compatibility?
The outside diameter as presented to the coupler, checked against the coupler standard's interface dimensions. Outside diameter governs the fit, so it is the first dimension to establish. Wall and length matter for the system, but they do not decide whether the coupler closes on the tube.
3
Does a measured diameter tell me whether the tube is acceptable?
Not on its own. A measurement only means something against stated limits and a stated instrument. If the permissible variation has not been taken from the governing standard, there is nothing to judge the measurement against — the normalizer holds that difference as an unresolved quantity rather than a pass or a fail.
4
How does a coating change the dimensions I should be comparing?
It adds to the outside surface, so the diameter the coupler meets is larger than the bare diameter. Where a coating applies, the presented diameter is the one that has to be checked against the coupler's size range. Recording only the bare figure leaves the interface check answering a question about a tube nobody is going to assemble.
5
Can this chart replace a mill certificate or a dimensional inspection?
No. The chart is a comparison aid built from data the buyer supplies. A mill test certificate ties the material to the standard it was made to, and a dimensional record evidences what was actually measured. Neither is produced by normalizing rows, and the chart should never be offered in place of them.
6
What should I send if I don't have the tolerance values yet?
Send the standard and revision you intend to work to, and mark the tolerance fields as pending. That is more useful than an assumed figure, because the enquiry can be reviewed against the document you have actually chosen. Guessed tolerances are the one input that makes a dimension chart actively misleading rather than merely incomplete.
Qualified RFQ
Send the dimensions with their sources
An enquiry that arrives with each dimension tagged to its standard and tolerance source can be reviewed technically before it is quoted commercially. The specification line you built above is carried into this form automatically — nothing you entered is discarded.
- Reviewed against the standard and tolerance source you state, not against a catalogue figure
- Missing sources reported back rather than silently assumed
- Price, availability and lead time confirmed on quotation — never published here
WhatsApp +971 56 398 0860sales@noordeirasteel.ae
Contact the commercial department
Monday – Saturday: 8.00 AM – 6.00 PM · Sunday: Closed
Calculation inputs
What a dimension row has to carry before it can be used
A dimension becomes a calculation input only once four things are attached to it. The table below is the same four, stated as the question each one answers and what happens when it is absent.
| Attachment | The question it answers | If it is absent | RFQ field |
|---|---|---|---|
| Standard + revision | Which document defines this dimension and on what basis? | The figure describes nothing in particular — two rows from different documents look identical. | Standard / revision field |
| Unit | What quantity is this number expressing? | Values are combined across unit systems and produce a figure that corresponds to no real quantity. | Unit field per dimension |
| Basis (nominal or actual) | Is this a designation or a measurement? | A measurement is averaged with a designation, or a designation is judged as though it carried limits. | Basis field per dimension |
| Tolerance source | Where do the permissible limits come from? | The dimension has no defined acceptance limits, so nothing can be accepted or rejected against it. | Tolerance source field |
Why no conversion is performed for you
Unit conversion is a stated decision with a stated factor and a stated rounding rule. Performing it silently would hide both, and a converted figure that cannot be traced back to its origin is worse than an unconverted one that can. The normalizer flags a mismatch and leaves the conversion — and the record of it — with you.
Worked example patterns
The three patterns behind the examples above
The worked examples are instances of three recurring patterns. Recognising the pattern is what lets you spot the same problem on an enquiry this page has never seen.
The false match
- Shape
- Two entries agree on a visible value — a nominal size, a grade or a measured figure — and are treated as equivalent.
- Where it breaks
- Agreement on one field is read as agreement on all of them, when the fields that decide the outcome were never supplied.
- Control
- Require the full field set on both sides before a comparison is marked comparable. Equality of one value is not equality of a dimension.
The unsourced measurement
- Shape
- A measured value is recorded and immediately judged — accepted, rejected or averaged — with no limits supplied to judge it against.
- Where it breaks
- The judgement is made against an expectation rather than against the permissible variation the standard defines.
- Control
- Hold the measurement as an unresolved quantity until the tolerance source and the instrument are both stated.
The borrowed standard
- Shape
- A figure is carried from one document or product form into a context governed by another, because the number looks transferable.
- Where it breaks
- The number is now describing a different material, form or regime than the one it was published for.
- Control
- Keep the standard, edition and product form attached to every row. A row without them cannot be carried anywhere.
Reference pack
Assemble the record before you compare anything
There is no downloadable chart on this page, and deliberately so — a chart detached from its sources is exactly the artefact this resource warns against. What you can assemble is the record behind each row, and the list below is what that record contains.
- 1
The governing standard and revision
For the tube as a product — the document every dimension on the row is read from.
- 2
The tolerance source, with its clause
Where the permissible variation for outside diameter, wall and length is defined.
- 3
The coupler standard and revision
The interface reference the outside diameter is checked against.
- 4
The dimensional record
Measured outside diameter and wall against their tolerance bases, taken with a stated instrument.
- 5
The finish record
Where a coating applies: the coating standard and method, and how the presented diameter differs.
- 6
The design outputs
The dimensions and tolerances the scaffold design actually assumes, from the responsible engineer.
- 7
The mill test certificate
The standard, edition and grade the tube was made and tested to, traceable to the supplied lot.
Request the specification set
Send the standard and revision you intend to work to, and the commercial department will confirm what can be supplied against it, with the documents that evidence it. Price on request.
Noor Deira Steel Trading L.L.C. — Office 3303, Churchill Executive Tower, Business Bay, Dubai, United Arab Emirates.