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Piping Spec Calculator
Preliminary sizing of a piping spec: enter material, pressure and temperature – get wall thicknesses, bolt sets, a spec sheet and matching ASEING catalogs. On request, the entire class as a Plant 3D catalog – including valves, also for dairy pipe (Excel for the Catalog Builder, 0.1 catalog credit per family, €13–17 net depending on the package).
Background, basis, prices and sources ▸
Continue with this piping spec
The most recently calculated class is available for selection in the following calculators as "Current piping spec".
Support spans
Transfer via the "Support spans" button above.
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Pipe sizing & pressure drop
Does the DN suit the flow rate? Pressure drop including fittings.
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Pipe weight
Load per support, entire line from PCF.
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Thermal expansion
Expansion, compensator, expansion leg.
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As a Plant 3D catalog: "Spec sheet & download" tab (0.1 catalog credit per family, €13–17 net depending on the package). Also: ASEING Piping Catalogs · Catalog Checker · Spec creation · Plant Engineering Infobase · Demo (30 min)
Basis & sources
What the tool calculates with, which standards and data it relies on and where its limits are. As of September 2026. For practice: Understand it and try it out.
Estimated values: dimensions, material properties, ratings and product ranges are generalized estimates from publicly available manufacturer data. They may deviate from the respective standard in individual points. The current standard and your manufacturer's data are binding. You can load your own values – e.g. from your standard – directly in the tool; they stay on your computer and are not transferred to us.
Calculation method
- Allowable stressf from strength values at design temperature and the safety factors of the selected code
- Wall thicknessFormula of the code, e.g. DIN EN 13480-3, 6.1: e = p·D / (2·f·z + p); ASME B31.3, 304.1.2: t = P·D / (2·(S·E·W + P·Y))
- AllowancesOrdered wall thickness T − c₁ (minus tolerance) − c₂ (corrosion) ≥ e; next wall thickness in the series or product range
- ClassP/T table, flange PN, gasket, bolt set and matching ASEING catalogs
Standards & codes
Reference: the assistant follows Autodesk's file structure and the connection types of these standards. Standard texts and standard tables are not included.
| DIN EN 13480-3 | Wall thickness and allowable stress steel/stainless steel |
|---|---|
| AD 2000 B0, B1, B9 | Calculation per AD 2000; copper K = Rm, S = 3.5 |
| DIN 2413-1 / -2 | Steel pipes, including hydraulics |
| ASME B31.3 | Process Piping, with ASME B36.10/B36.19 (pipe dimensions), B16.5 (ratings), B16.9 (fittings) |
| EN ISO 15494, DVS 2205 | Plastic pipes (long-term strength, reduction) |
| DIN 16965/16966, AD 2000 N 1 | GRP: catalog nominal pressure, no calculation of its own |
| DIN 11850/11851/11852, DIN 32676 | Hygienic/dairy pipe, threaded fitting, clamp |
| DIN EN 1057 | Copper pipes |
| DIN EN 1092-1 | Flanges (reference for dimension series) |
| EN 10220 / DIN EN ISO 1127 | Outside diameters and wall thickness series |
Data & origin
| Strength values | Estimates from publicly available manufacturer data, generalized (reference: material standards DIN EN 10216/10217/10028, VdTÜV material data sheets for nickel alloys) |
|---|---|
| Dimensions (pipes, fittings, flanges, gaskets, bolts), ratings | Estimates from publicly available manufacturer data, generalized (reference: the dimension standards listed) |
| Product range, minimum wall thicknesses, delivery status | ASEING empirical values (not a standard) |
| Media aggressiveness classes | ASEING proposal, not a standard; fluid group per PED |
| Insulation thickness | Minimum thickness per GEG Annex 8 (λ = 0.035 W/(m·K)) |
| Catalog export | Geometry from the ASEING steel catalog, valve face-to-face dimensions (reference EN 558) – estimates from manufacturer data |
| Catalog export ASME | Dimensions (reference ASME B16.9 / B16.5, stud bolt lengths) from publicly available distributor catalogs, generalized – estimates; gaskets simplified |
Assumptions & limits
- Preliminary sizing – does not replace a complete strength verification (additional loads, cyclic loading, flange connections, creep, test pressure).
- Table values are estimates and may deviate from the standard in individual points – the current standard and the manufacturer data are binding. You can load your own values in the calculator.
- Red box "Not usable as is": inputs outside the operating limits – the result must not be used as is.
Standards status for this page 52 standards · researched September 2026
| Standard | Contents | Current edition | Replaced / successor |
|---|---|---|---|
| Directive 2014/68/EU (PED) | Pressure Equipment Directive (recast) | Directive 2014/68/EU of 15 May 2014 (OJ L 189 of 27 June 2014) | replaces Directive 97/23/EC (superseded on 19 July 2016) |
| DIN EN 13480-3 | Metallic industrial piping – Part 3: Design and calculation | DIN EN 13480-3:2024-12 | replaces DIN EN 13480-3:2017-12; DIN EN 13480-3/A1:2021-05; DIN EN 13480-3/A2:2020-12 |
| AD 2000 Merkblatt B 1 | Cylindrical and spherical shells under internal overpressure (Annex 1: calculation of pipe bends and elbows) | AD 2000 Merkblatt B 1:2000-10 (with B 1 Annex 1:2025-06) | replaces AD B 1:1986-06 (base sheet); AD 2000 Merkblatt B 1 Annex 1:2006-05 (by Annex 1:2025-06) |
| DIN EN ISO 15494 | Plastics piping systems for industrial applications – PB, PE, PE-RT, PE-X, PP | DIN EN ISO 15494:2021-05 | replaces DIN EN ISO 15494:2019-01 |
| DIN EN 1057 | Seamless round copper tubes for water and gas applications (plumbing/heating) | DIN EN 1057:2010-06 | replaces DIN EN 1057:2006-08 |
| DIN EN 10220 | Seamless and welded steel tubes – General tables of dimensions and masses per unit length | DIN EN 10220:2003-03 | replaces DIN V ENV 10220:1994-02; DIN 2448:1981-02; DIN 2458:1981-02 |
| DIN EN ISO 1127 | Stainless steel tubes – Dimensions, tolerances and conventional masses per unit length | DIN EN ISO 1127:2019-03 | replaces DIN EN ISO 1127:1997-03 |
| DIN 86019 | Seamless tubes of CuNi10Fe1.6Mn for piping – Dimensions | DIN 86019:2006-02 | replaces DIN 86019:1997-07 |
| DIN EN 10253-4 | Butt-welding pipe fittings – Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements | DIN EN 10253-4:2025-10 | replaces DIN EN 10253-4:2008-06; DIN EN 10253-4 Corrigendum 1:2009-11 |
| DIN EN 10253-2 | Butt-welding pipe fittings – Part 2: Non-alloy and ferritic alloy steels with specific inspection requirements | DIN EN 10253-2:2026-07 | replaces DIN EN 10253-2:2021-11 |
| DIN EN 10216-3 | Seamless steel tubes – Part 3: Alloy fine grain steel tubes | DIN EN 10216-3:2014-03 | replaces DIN EN 10216-3:2004-07 |
| DIN EN 10216-2 | Seamless steel tubes – Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties | DIN EN 10216-2:2025-02 | replaces DIN EN 10216-2:2020-04 |
| DIN EN 10216-5 | Seamless steel tubes – Part 5: Stainless steel tubes | DIN EN 10216-5:2021-06 | replaces DIN EN 10216-5:2014-03; DIN EN 10216-5 Corrigendum 1:2015-01 |
| DIN EN 10269 | Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties | DIN EN 10269:2014-02 | replaces DIN EN 10269:2006-07 (incl. three corrigenda 2006-10, 2007-02, 2009-05) |
| DIN EN 10217-7 | Welded steel tubes – Part 7: Stainless steel tubes | DIN EN 10217-7:2021-06 | replaces DIN EN 10217-7:2015-01 |
| DIN EN 10217-2 | Welded steel tubes – Part 2: Electric welded non-alloy and alloy steel tubes with specified elevated temperature properties | DIN EN 10217-2:2019-08 | replaces DIN EN 10217-2:2005-04 |
| DIN EN 10216-1 | Seamless steel tubes for pressure purposes – Part 1: Non-alloy steel tubes with specified room temperature properties | DIN EN 10216-1:2014-03 | replaces DIN EN 10216-1:2004-07 |
| DIN EN 10217-1 | Welded steel tubes for pressure purposes – Part 1: Electric welded and submerged arc welded non-alloy steel tubes with specified room temperature properties | DIN EN 10217-1:2019-08 | replaces DIN EN 10217-1:2005-04 |
| DIN EN ISO 3183 | Petroleum and natural gas industries – Steel pipe for pipeline transportation systems | DIN EN ISO 3183:2020-02 | replaces DIN EN ISO 3183:2018-09 |
| DIN EN ISO 8434-1 | Connectors for fluid power and general use – Part 1: 24° cone connectors | DIN EN ISO 8434-1:2018-11 | replaces DIN EN ISO 8434-1:2008-02; DIN EN ISO 8434-1 Corrigendum 1:2009-09; DIN 3859-2:1999-07 |
| AD 2000 Merkblatt B 0 | Calculation of pressure vessels | AD 2000 Merkblatt B 0:2025-06 | replaces AD 2000 Merkblatt B 0:2014-11 |
| DIN EN 12449 | Copper and copper alloys – Seamless, round tubes for general purposes | DIN EN 12449:2023-08 | replaces DIN EN 12449:2019-12 |
| AD 2000 Merkblatt W 6/2 | Materials for pressure vessels – Copper and wrought copper alloys | AD 2000 Merkblatt W 6/2:2026-07 | replaces AD 2000 Merkblatt W 6/2:2021-03 |
| DIN EN 1254-1 | Copper and copper alloys – Plumbing fittings – Part 1: Capillary fittings for soldering or brazing to copper tubes | DIN EN 1254-1:2021-10 | replaces DIN EN 1254-1:1998-03 |
| DIN 86087 | Butt-welding fittings for CuNi piping – Saddle branches | DIN 86087:2024-10 | replaces DIN 86087:2008-02 |
| DIN 86089 | Butt-welding fittings for CuNi piping – Concentric reducers | DIN 86089:2024-10 | replaces DIN 86089:2008-02 |
| DIN EN 1092-1 | Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated – Part 1: Steel flanges | DIN EN 1092-1:2018-12 | replaces DIN EN 1092-1:2013-04; DIN EN 1092-1 Corrigendum 1:2014-08 |
| DIN EN 558 | Industrial valves – Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems | DIN EN 558:2022-09 | replaces DIN EN 558:2017-05 |
| ASME B31.3 | Process Piping | ASME B31.3-2024 | replaces ASME B31.3-2022 |
| DIN EN 13480 | Metallic industrial piping | DIN EN 13480-1 to -6 and -8:2024-12; Part 7 as DIN CEN/TR 13480-7:2022-08 | replaces the 2017-12 editions with amendments A1 ff. |
| DIN 2413 | Wall thickness calculation for steel pipes | DIN 2413:2020-04 (hydraulic pipes only) | replaces DIN 2413-1 and -2:1993-10 (withdrawn; for piping, DIN EN 13480-3:2024-12 applies) |
| DIN 2413-1 | Steel pipes – Calculation of wall thickness of steel pipes subjected to internal pressure | withdrawn | today: DIN 2413:2011-06 (today 2020-04, hydraulics only) and DIN EN 13480-3 (replacement 2002-08; today 2024-12) |
| ASME B36.10 (until 2018: B36.10M) | Welded and Seamless Wrought Steel Pipe | ASME B36.10-2022 | replaces ASME B36.10M-2018 |
| ASME B36.19 (until 2018: B36.19M) | Welded and Seamless Wrought Stainless Steel Pipe | ASME B36.19-2022 | replaces ASME B36.19M-2018 |
| ASME B16.5 | Pipe Flanges and Flanged Fittings NPS 1/2 through NPS 24 Metric/Inch | ASME B16.5-2025 | replaces ASME B16.5-2020 |
| DIN 8074 | Polyethylene (PE) pipes – PE 80, PE 100 – Dimensions | DIN 8074:2023-10 | replaces DIN 8074:2011-12 |
| DIN 8075 | Polyethylene (PE) pipes – PE 80, PE 100 – General quality requirements, testing | DIN 8075:2018-08 | replaces DIN 8075:2011-12 |
| DIN 8077 | Polypropylene (PP) pipes – PP-H, PP-B, PP-R, PP-RCT – Dimensions | DIN 8077:2008-09 | – |
| DIN 8078 | Polypropylene (PP) pipes – General quality requirements, testing | DIN 8078:2008-09 | replaces DIN 8078:2007-05 |
| DIN 21057 | Piping specs | DIN 21057-1:2023-08; Parts 5/6:2016-12; Parts 10–12:2026-04/-05 | replaces PAS 1057; DIN 21057-1:2016-12; DIN 21057-10 to -12:2017-04 |
| DIN 2413-2 | Steel pipes – Calculation of wall thickness of pipe bends subjected to internal pressure | withdrawn | today: DIN 2413:2011-06 (today 2020-04, hydraulics only) and DIN EN 13480-3 (replacement 2002-08; today 2024-12) |
| AD 2000 Merkblatt B 9 | Openings in cylinders, cones and spheres | AD 2000 Merkblatt B 9:2023-03 | replaces AD 2000 Merkblatt B 9:2009-03 (previous edition according to the edition sequence; no replacement note in the 2023-03 edition) |
| DIN EN 13480-2 | Metallic industrial piping – Part 2: Materials | DIN EN 13480-2:2024-12 | replaces DIN EN 13480-2:2017-12; DIN EN 13480-2/A1:2018-12; DIN EN 13480-2/A2:2018-12 |
| DIN 11864-1 | Stainless steel valves for aseptic, chemical and pharmaceutical applications – Part 1: Unions | DIN 11864-1:2025-04 | replaces DIN 11864-1:2017-10 |
| DIN 2510-1 | Bolted connections with reduced shank – Overview, scope, installation examples | DIN 2510-1:2026-09 | replaces DIN 2510-1:1974-09 |
| DIN EN 1591-1 | Flanges and their joints – Design rules for gasketed circular flange connections – Part 1: Calculation | DIN EN 1591-1:2026-02 | replaces DIN EN 1591-1:2014-04 |
| ASME B16.9 | Factory-Made Wrought Buttwelding Fittings | ASME B16.9-2024 | replaces ASME B16.9-2018 |
| DIN EN ISO 4014 | Hexagon head bolts – Product grades A and B | DIN EN ISO 4014:2022-10 | replaces DIN EN ISO 4014:2011-06 |
| DIN EN ISO 4017 | Hexagon head screws – Product grades A and B | DIN EN ISO 4017:2022-10 | replaces DIN EN ISO 4017:2015-05 |
| DIN EN ISO 4032 | Hexagon nuts (style 1) | DIN EN ISO 4032:2023-12 | replaces DIN EN ISO 4032:2013-04 |
| DIN EN ISO 7089 | Plain washers – Normal series, product grade A | DIN EN ISO 7089:2000-11 | replaces DIN 125-1:1990-03; DIN 125-2:1990-03 |
| ISO/TR 15608 | Welding – Guidelines for a metallic materials grouping system | withdrawn | today: ISO 15608:2025 (published 16 October 2025) |
Researched at DIN Media, ISO, IEC and ASME, as of September 2026. Before binding use, please check the current edition with the standards publisher. Overview of all standards: Plant Engineering Infobase · Standards status.
Understand it and try it out
How thick does a pipe need to be to withstand the pressure? The basic equation is simple – it gets interesting with temperature, material and allowances.
The terms in five minutes
- Calculated wall thickness e
- For straight pipes under internal pressure (DIN EN 13480-3): e = p · Da / (2 · f · z + p). p = design pressure, Da = outside diameter, f = allowable stress, z = weld joint factor.
- Allowable stress f
- From the strength values of the material at design temperature with safety factors. As the temperature rises, f decreases – the pipe has to get thicker.
- Allowances
- Corrosion allowance, minus tolerance of the wall thickness and thinning during bending are added to e; the next wall thickness in the series is ordered.
- Weld joint factor z
- How much of the strength the longitudinal weld achieves, e.g. 1.0 with full testing, 0.85 with reduced testing scope.
- Piping spec
- Defines which pipes, fittings, flanges, gaskets and valves are used for a given pressure, temperature and media range.
Try it out and understand it
Change one value in the calculator above and watch what happens to the others:
| Try it | What happens | Why |
|---|---|---|
| Double the pressure | The calculated wall thickness almost doubles. | e ~ p, as long as p is small compared to 2 · f · z. |
| Increase temperature from 20 to 300 °C | e increases even though the pressure doesn't change. | The allowable stress decreases with temperature. |
| Weld joint factor from 1.0 to 0.85 | e increases by around 18%. | The weld carries less load – a greater wall thickness compensates for this. |
Typical mistakes
- Setting the flange PN equal to the design pressure.
- Forgetting the allowances and ordering the calculated wall thickness directly.
For practice
Exercise: steel pipe 114.3 mm, 16 bar, 20 °C, f = 150 N/mm², z = 1. How thick does it need to be by calculation – and why does the catalog pipe still have 3.6 mm?
Show solution
e = 1.6 N/mm² · 114.3 / (2 · 150 · 1 + 1.6) ≈ 0.61 mm. 3.6 mm is ordered because standard series specify minimum wall thicknesses for handling, welding, corrosion and mechanical loads – at low pressure, it is not the internal pressure that determines the wall.
For training and studies: this page may be shown in class. Property values are guide values; for verification, the standards and manufacturer data apply.