Manufacturing
Forging, heat treatment, machining, overlay, assembly and test - with the record produced at each stage.
7 documents produced
Quality & manufacturing
You cannot see heat treatment, material grade or NDE results by looking at a finished valve. The documentation is not administration - it is the only evidence that what is inside the valve matches the datasheet. These pages describe what is done and what record it produces.
Verification status. Several pages in this section carry a pending-verification
note. Facility capability, test equipment capacity and certification status must be documented
with real evidence before those claims go live. Until then this section describes the process
and the required records - not a claim about what exists.
The route, with intervention points
Indicative levels. The actual plan is agreed with you before manufacture - see the ITP page.
- 01Forging R
Mill-certified heat, open-die or closed-die per item
- 02Heat treatment R
Normalise and temper per grade; furnace charts recorded
- 03UT before machining W
While the part can still be rejected economically
- 04Machining M
Heat number transferred at every stage
- 05Hardfacing W
Stellite 6 overlay, two layers, controlled dilution
- 06PWHT + hardness survey W
The only production check that creep grades will perform
- 07PMI W
Every pressure part, not a sample
- 08Assembly M
New seal ring, preload to specification, clearances recorded
- 09Pressure testing H
Shell, seat and back seat per API 598
- 10Dimensional inspection W
Against the approved GA drawing
- 11Preservation and packing W
Specified for the actual site storage period
- 12Document package review H
Heat numbers cross-checked before release
H Hold point - work stops until released W Witness - client or TPI may attend R Review - document review only M Monitor - in-process check
Pages in this section
Testing
Shell, seat, back seat and functional testing, with what each test proves and what the report should show.
4 documents produced
Material Traceability
The chain from mill heat to finished nameplate, and how to check that it is unbroken.
4 documents produced
NDE Inspection
Which NDE method finds which defect, when it is applied, and how to write the requirement.
4 documents produced
Pressure Testing
Test pressures, durations, media and acceptance - and the details that make a test report credible.
3 documents produced
Inspection Workflow (ITP)
A typical ITP structure with hold, witness and review points marked - and how to agree yours before manufacture starts.
3 documents produced
Packaging & Shipping
Preservation, end protection and packing for valves that may sit in a laydown area for a year before installation.
3 documents produced
Certificates
Certification status, stated honestly. Items are listed only when a verifiable certificate exists.
The one thing to ask any supplier
Ask for a sample document package from a previous similar item, with the commercial information removed. Not a list of what will be supplied - an actual package.
Two things become clear immediately: whether the supplier can produce the documents at all, and whether they are legible, complete and internally consistent. Heat numbers on the MTC should match the heat numbers in the dimensional report and on the valve. If they do not, that is worth knowing before the order rather than at inspection.