Excel doesn't know D1.1. Clause5 does.

Stop retyping what the drawing already says into a spreadsheet that can't check it. Clause5 is the welding compliance system: Flux reads the drawing, drafts the WPS with every value cited to the clause, and seals it so any inspector can verify. In private beta now. The study floor is free to use today.

Get early access

12 calculators · 80 standards · 12 languages · free, no login

Act 1 · How the weld is allowed to happen

  1. Joints read.
  2. Every value cited.

The WPS says how the weld is allowed to happen. Everything after proves it did.

Act 2 · Proof it did happen that way

  1. Welders still qualified.
    Welder W-14 · SMAW Continuity current · Clause 6.2.3.1
  2. Every weld logged, traced to its heat.
    Heat 52117-B → joint B-U2 A572 Gr 50 · interpass logged
  3. Inspected & accepted.
    Visual inspection · ACCEPTED Table 8.1 · Clause 8.9
  4. The book your auditor signs.
    Certificate of Conformance AWS D1.1:2025 · every line traces back ✓ nothing altered after signature clause5.io/verify →

You just watched the whole weld.

Get early access to the rest

The values above are read straight from AWS D1.1:2025. Scan the seal, or check any document at clause5.io/verify. No account needed.

Run one lookup yourself. Same engine, right now.

Low-hydrogen process assumed. Full calculator: all steels, processes, and hydrogen classes →

1Upload the drawing. Any shop drawing with weld callouts. Yours stays yours.
2Flux reads the joints. It flags what needs attention before you bid or burn rod.CJP butt joint · A572 Gr 50 · 1 in
3Every value cited. Preheat, joint detail, continuity: each one traced to the governing table or clause.50°F · Clause 5.7.1 · Table 5.11 Category B
4The WPS drafts itself. Joint, process, preheat, and welder quals land in one governed document.
5You sign. It seals. A QR code goes on the record. Any inspector can verify it, independently, without an account.
Flux drafts. Your CWI signs. Every document seals with a QR code any inspector can verify, independently, without an account. Verify a document →

Three ways in

Opening with the beta Read my drawing Free start · no card

Upload a drawing and get the full read: joints flagged, values cited, before you bid or burn rod.

Notify me when it opens ↓
Opening with the beta Build a WPS Free start · no card

Answer the interview, get a cited draft. Keeping and sealing it takes a free account.

Notify me when it opens ↓
Opening with the beta Import what I have Free start · no card

Bring your existing WPS and qual records. Clause5 reads them in and builds the chain around them.

Notify me when it opens ↓

The WPS builder and import arrive with the beta.

Leave an email and we'll tell you the moment they land. Nothing else.

Free during beta · We'll email when they arrive · Nothing else. By submitting, you agree to Terms and Privacy.

What it retires

Audit week

"The turnover package should have been assembling itself all year."

It does. Completeness-gated auto-assembly builds the QC turnover package as the work happens, not the week the auditor lands.

And it's all one chain, sealed and verifiable.

The recall

"Which joints did that lot touch? Four seconds, not a week."

Heat-to-joint and filler-lot traceability: lot to heats to joints to welders, in one query.

And it's all one chain, sealed and verifiable.

The expiry ambush

"It knows the qual lapses before the inspector does."

The qualification matrix tracks continuity and alerts before the six-month window closes, per D1.1 Clause 6.2.3.1.

And it's all one chain, sealed and verifiable.

Nothing is retyped on the way in. Nothing gets dug out of a spreadsheet when the question comes back. From the drawing read to the sealed turnover package, it's one chain.

Proof

Scan the seal. Get the record. Every sealed document carries a QR code that resolves on the public verify page: who signed, what it covers, whether it's current. Verify a document →

Ask it yourself.

Every answer cited to the clause.

✓ Every answer cites the clause ✓ AI assists, CWI decides ✓ Current edition, always

Answers cited to the clause. 80 standards encoded, 12 languages.

The study floor

Studying for the CWI? The study floor is free: practice test, symbols, calculators.

Go to the free tools →

Popular guides

What Clause5 is

A welding compliance system

Clause5 reads fabrication drawings, drafts welding procedure specifications with every value cited to the governing code, attaches welder qualifications, tracks heat and filler-lot traceability, and assembles a sealed, verifiable QC turnover package. Flux, the assistant inside it, answers welding-code questions with the exact table or clause reference.

Who it's for

US structural fabrication shops, QC managers, and welding inspectors working to AWS D1.1:2025 and the other encoded standards.

What's free

The study floor is permanently free: the CWI practice test, weld symbol reference, and the calculators. The drawing read, WPS builder, and import open with the private beta. A free account keeps work, with up to 3 active WPS.

What it costs

Pro Shop is $149 per month, flat per organization, unlimited seats.

Which standards

AWS D1.1:2025 leads. 80 standards encoded, including the AWS D-series, ASME Section IX, API 1104, CSA W59, AS/NZS 1554, ISO 15614-1, and EN 1011-2. 12 languages. The beta goes past lookup: ASME Section IX procedure qualification, AWS A5.x filler classifications, and ISO 5817 acceptance criteria arrive with it.

What welding codes does Clause5 support?
Clause5 covers 80 welding standards: AWS D1.1:2025, D1.5, D1.4, D1.6, CSA W59, AS/NZS 1554, ASME Section IX, API 1104, ISO 15614-1, EN 1011-2, and the AWS A5.x filler metal series. Every calculator uses the current published edition. The preheat calculator implements all of D1.1 Table 5.11: 25 steels, 5 processes. Free, no signup, 12 languages.
Does it replace a CWI?
No. Clause5 does the reference work, looking up parameters, tables, and clause references from the governing code. For A992, FCAW, 1-1/2 inch: it returns 50°F from D1.1 Table 5.11 Category B in under a second. Your CWI still inspects the work and verifies compliance per Clause 8. Research assistant, not replacement.
What if the code changes?
Clause5 updates when the standard updates. The D1.1:2025 edition revised Table 5.11 preheat categories and added new steels to Table 5.6, and those changes are already reflected in every lookup. A913 Gr.80 preheat and H4 hydrogen requirements are current. Every calculator and reference page matches the latest published edition.
Do I need to know the welding codes to use it?
No. Enter your material, process, and thickness. Clause5 finds the applicable standard and returns the requirements with the exact table and clause reference. For A36, GMAW, 1 inch: 150°F from D1.1:2025 Table 5.11, Category A. Ask Flux why, and it explains the hydrogen cracking risk and what changes with a different process. No code book needed.
Can an inspector verify a Clause5 document?
Yes. Every sealed Clause5 document carries a QR code and a SHA-256 seal hash. Scan the QR or enter the hash at clause5.io/verify to confirm the record is authentic and unchanged since it was finalized. No account is needed, and the check never exposes a shop's parameter values.

AWS D1.1 · D1.2 · D1.3 · D1.4 · D1.5 · D1.6 · D1.8 · D1.9 · CSA W59 · AS/NZS 1554 · ASME IX · API 1104 · ISO 15614-1 · EN 1011-2 · AWS A5.x series · AWS B5.1 · 80 standards · All 80 standards →

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