controlled dimensions · circular geometry · no schedule or pressure verdict

Controlled Pipe Geometry and Theoretical Mass Worksheet

Calculate bore, metal area, theoretical mass per length and total mass from documented outside diameter, wall thickness, density and length. No DN, NPS or schedule value is inferred.

strict decimal inputSI and inch-foot conversiongeneral geometry, not an ISO formula

Not a pipe-size, schedule, tolerance, pressure-rating or compliance selector. Use the governing product and design standards, current licensed tables, manufacturer documentation and engineering calculations for those decisions. Nominal dimensions are not proof of delivered dimensions.

Documented geometry and traceability

Outside diameter ODrequired positive plain decimal

Wall thickness tmust be less than one half of OD

Material mass density ρrequired controlled value; no steel preset

Pipe length Lrequired positive plain decimal

Calculation record ID

Pipe, spool, heat and item identifiers

Controlled product specification and edition

Drawing, line list or data sheet and revision

OD source, nominal/actual basis and unit

Wall source, nominal/actual basis and unit

Density source, material condition and temperature

Length source, definition and unit

Dimensional tolerance and measurement record

Corrosion, erosion and manufacturing allowances

Coating, lining, insulation, contents and attachments

Governing design code, contract and acceptance basis

Responsible engineer / reviewer

Review date

Notes and exclusionsOptional: ovality, eccentricity, fittings, end preparation, joints and measurement uncertainty.

OD and wall thickness are controlled for the same pipe/item, and their nominal or measured basis, units, tolerances and applicable edition are recorded.
Density is a controlled mass-density value for the stated material condition and temperature; 7850 kg/m³ is not assumed automatically.
Any coating, lining, insulation, contents, attachments, end preparation, ovality, eccentricity and allowances are excluded or handled separately as documented.
No DN/NPS equivalence, schedule, STD/XS class, tolerance, pressure capacity, minimum wall, procurement or code-compliance decision will be inferred from this geometry result.

Theoretical geometry and mass

Theoretical mass per length

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Theoretical total mass

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Inside diameter ID

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Metal cross-sectional area

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Internal cross-sectional area

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Metal volume over length

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Normalized OD and wall

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Normalized density and length

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Equations, units and classification

ID = OD − 2t
Ametal = (π/4)(OD² − ID²) = π(OD − t)t
Ainternal = (π/4)ID²
Vmetal = Ametal · L · 10⁻⁶
m′ = Ametal · ρ · 10⁻⁶
m = m′ · L

Kogus	Working unit	Meaning and boundary
OD, t, ID	mm	ideal concentric circular dimensions; t must satisfy 0 < t < OD/2
Ametal, Ainternal	mm²	ideal cross-sectional areas; not adjusted for ovality, eccentricity or tolerances
ρ	kg/m³	controlled mass density supplied by the user; not a universal steel constant
Vmetal	m³	ideal metal volume for the entered pipe length only
m′, m	kg/m, kg	theoretical bare-pipe mass, excluding every unmodelled addition and dimensional variation

The factor 10⁻⁶ converts mm² to m². The equations are elementary circular geometry and mass = density × volume. They are mitte formulas specified by ISO 4200 or ASME B36.10.

Removed unsafe claims

No unlicensed DN/NPS/schedule database. The previous page labelled an uncontrolled ASME-style schedule table as ISO 4200 data.
No global STD = Schedule 40 or XS = Schedule 80 substitution. Those weight-class designations may coincide with a schedule thickness at some sizes, but they are not globally interchangeable. The old table silently used STD/XS-like fixed thicknesses as Schedule 40/80 for larger sizes.
No pressure estimate from schedule. The old generic “schedule ≈ 1000P/S” and “higher schedule means higher pressure rating” decision language was removed. Pressure design depends on the governing design code, material, temperature, allowances, tolerances, joints, loads and other factors.
No universal 7850 kg/m³ preset. Density is now required and traceable; the output is explicitly theoretical mass, not measured weight.
No claim that ISO 4200 and ASME B36.10 tables are identical. Exact table rows, tolerances and cross-designations require the applicable controlled edition and product specification.
No hidden state. Defaults, presets, automatic lookup, URL parameters, local history, clipboard output, dynamic HTML and external math libraries were removed.

Source traceability

Claim	Klassifikatsioon	Evidence
ISO 4200:1991 Edition 4 is published and currently at lifecycle stage 90.60 (under review). Its official scope is general tables of dimensions and masses per unit length for plain-end welded and seamless steel tubes; it is not applicable to tubes primarily intended to be screwed.	Official ISO status and scope; no closed table values reproduced	ISO 4200:1991
ISO 6708:1995 Edition 2 defines and selects DN when standards for pipework components use that designation system; it gives preferred DN values. DN is therefore not calculated from measured OD by this worksheet.	Official ISO status and scope	ISO 6708:1995
ASME B36.10-2022, a revision of ASME B36.10M-2018, standardizes dimensions of welded and seamless wrought steel pipe for high or low temperatures and pressures. The current table is licensed and is not recreated here.	Official ASME edition and scope	ASME B36.10-2022; official title/contents PDF
Tenaris’ 2026 manufacturer catalogue presents schedule numbers and STD/XS weight classes as separate designations even where individual thickness values coincide. This directly contradicts a global substitution rule.	Current manufacturer product document; PDF page 13 visually inspected	Tenaris Pipes for Civil and Industrial Installations, 2026, PDF p. 13
The inch is exactly 25.4 mm and the international foot is exactly 0.3048 m. With the international avoirdupois pound, 1 lb/ft³ = 16.01846337396014 kg/m³.	Official NIST SI conversion factors	NIST SP 811 Appendix B; NIST SI Units—Length

Accessed: 15 July 2026. Exact ISO/ASME dimension tables, schedule rows, dimensional tolerances, mass-table rounding rules and any DN/NPS cross-reference remain NEEDS_LICENSED_SOURCE.

Reference check

For OD = 114.3 mm, t = 6.02 mm, ρ = 7850 kg/m³ and L = 6 m, the worksheet gives ID = 102.26 mm, metal area = 2047.83334823 mm², theoretical mass per length = 16.0754917836 kg/m and theoretical total mass = 96.4529507019 kg. These are geometry results from the entered values, not an ISO 4200 or ASME table row.

Küsimused

Can I enter a DN, NPS or schedule?

No. Obtain OD and wall thickness from the current controlled product standard, purchase specification, drawing, manufacturer certificate or measurement record, then enter those dimensions explicitly.

Does the mass equal the delivered pipe weight?

Not necessarily. Dimensional tolerances, density variation, ovality, eccentricity, coatings, linings, end preparation, joints and attachments can change actual mass. Use a certified or measured value when required.

Can this determine pressure capacity?

No. Pressure design must follow the governing current design code and account for material strength at temperature, design factors, tolerances, allowances, joints, loads, manufacturing route and the complete service case.