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Codes & Standards · Piping Design Services

Piping Design Services Codes & Standards Explained

Buyers of piping design services tend to ask the same questions: what is actually included, what does it cost, which standards apply and how do you pick a reliable partner? This article answers all four with the level of detail your project team needs.

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Key takeaways3 min read4 sections

The short version

  1. 1The standards that govern piping design servicesPiping Design Services is governed by ASME B31.1, ASME B31.3, ASME B31.8.
  2. 2How code compliance is demonstratedCompliance is shown through documentation, not assertion. Your package should include:
  3. 3Common compliance mistakesThe most frequent compliance failures we see in piping design services are edition drift (working to a superseded code edition), mixing code systems mid-package, and missing project-specific overlays.
  4. 4Working across multiple jurisdictionsGlobal projects often need one package that satisfies several jurisdictions.
  5. 5The bottom lineName the edition, not just the code family — ASME B31.1 compliance is demonstrated through a documented design basis, calculations and a checker's sign-off.

Quick answer

In short, piping design services means developing complete piping engineering from layout and routing through to isometrics and BOM. The work is governed by ASME B31.1 and ASME B31.3, executed on licensed CADWorx and checked against a documented QA checklist before issue.

The standards that govern piping design services

Piping Design Services is governed by ASME B31.1, ASME B31.3, ASME B31.8. Which one leads depends on the project location and the owner's specification — a US refinery package and a European commercial building may need the same discipline executed to entirely different rules.

Beyond the headline code, most projects layer client specifications on top: operator standards (Shell DEPs, Saudi Aramco SAES, ADNOC), fabricator preferences and local authority requirements. A good piping design services partner maps all of them into a compliance matrix at kick-off.

How code compliance is demonstrated

Compliance is shown through documentation, not assertion. Your package should include:

  • Design basis / basis-of-design note referencing the governing code and edition.
  • Calculation reports with load combinations and acceptance criteria.
  • Drawings flagged with the applicable code and material grades.
  • A documented checker's review with sign-off.
  • Revision-controlled transmittals so the latest code-compliant issue is unambiguous.

Common compliance mistakes

The most frequent compliance failures we see in piping design services are edition drift (working to a superseded code edition), mixing code systems mid-package, and missing project-specific overlays. Each is avoidable with a kick-off compliance matrix and a senior review gate.

Working across multiple jurisdictions

Global projects often need one package that satisfies several jurisdictions. We deliver piping design services to ASME B31.1 and ASME B31.3 routinely and maintain checklists for each, so multi-code packages are reviewed against every governing standard, not just the primary one.

Piping Design Services — codes & standards

Piping Design Services Codes & Standards Explained: FAQ

Which code applies to piping design services?

In short, piping design services means developing complete piping engineering from layout and routing through to isometrics and BOM. The work is governed by ASME B31.1 and ASME B31.3, executed on licensed CADWorx and checked against a documented QA checklist before issue.

Which software is used for piping design services?

We deliver on licensed CADWorx, CAESAR II, AutoCAD Plant 3D, Smart P&ID and issue native files plus PDF, DWG and IFC on request.

Which standards do you follow for piping design services?

We work to ASME B31.1, ASME B31.3, ASME B31.8, plus client specifications such as Shell DEPs and major operator standards.

How long does a piping design services package take?

Small packages are typically delivered in 3–7 working days; larger scopes are split into phased submissions agreed at kick-off.

How do I get a quote for piping design services?

Send your drawings or scope through our quote form — a senior engineer reviews them and returns a fixed-price proposal within 24 hours, free and without obligation.

Code by code

The standards behind a piping design services package

Each standard below governs a different slice of the scope. A compliant package names the edition of every one that applies and carries the evidence in the transmittal.

Multi-jurisdiction projects need the package reviewed against every governing standard — not only the primary one named in the contract.

  1. ASME B31.1Global · power

    Governs power and boiler external piping — allowable stresses, wall thickness and support spacing.

    Evidence: a stress analysis report giving code stress ratios at every node of concern.

  2. ASME B31.3Global · process

    Governs refinery and chemical process piping — wall thickness, flexibility, sustained and occasional stress.

    Evidence: stress output showing code ratios, nozzle loads and support reactions against allowables.

  3. ASME B31.8Global · gas

    Governs gas transmission and distribution piping, including location class and design factors.

    Evidence: a design basis naming the location class, design factor and MAOP calculation.

Work through this

The piping design services checklist

Fifteen points, in the order you will need them — from assembling the enquiry to signing off the final transmittal. Tick them here, or copy them into your own project procedure.

15 checks
01

Before you send the enquiry

Everything a supplier needs in order to price accurately.

02

Proving compliance

Compliance is documented, never asserted.

03

Before you accept the package

Fifteen minutes here saves a fabrication hold.

About this guide

How we know this

Written from delivered work
The guidance here comes from live piping design services packages produced on licensed CADWorx, CAESAR II, AutoCAD Plant 3D, Smart P&ID — not from a content brief.
Checked against the governing codes
Every technical statement is cross-read against ASME B31.1, ASME B31.3, ASME B31.8 and the operator specifications our teams work to daily.
Reviewed through the same checker gate
A senior engineer who signs off piping design services deliverables reviewed this article, using the independent-check process every client package passes through.
Revised when the standards move
Articles are re-read and re-stamped whenever a governing code edition, software release or client specification changes materially.

2009

Engineering since

1,200+

Projects delivered

40+

Countries served

60+

In-house engineers

Reviewed by

Piping Design & Stress practice

Senior engineer, SES piping design & stress team

Last reviewed
14 January 2026
Review gate
Independent checker

Working toolset

CADWorxCAESAR IIAutoCAD Plant 3DSmart P&ID

Next step

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Read next: What Is Piping Design Services? A Complete Guide

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