PED Compliance

Material Traceability

Manufacturing Records

How Bhutanese Pressure Equipment Manufacturers Can Prepare Material Traceability Records for PED Compliance

By First Welding Certification Technical Editorial Team

6 Min Read Time

30 Oct 2026

PED Material Traceability Workflow

Verify Material Certificates

Register Incoming Materials

Link Components to Equipment

Verify Final Records

Check Heat Numbers

Track Cutting & Identification

Introduction

While having a material certificate for the correct grade of material with the correct chemical composition and mechanical properties is essential, you must also be able to demonstrate that the material on your certificate is the material that has been used in the finished equipment. This can be more challenging when materials are cut down to smaller sections, multiple batches of material have been used in the assembly, and identification is difficult to read during fabrication.

By implementing a good traceability process for your materials, Bhutanese manufacturers of pressure vessels, industrial pipework and other pressure equipment for the European market can avoid some of these issues. Material identification requirements are covered in Annex I, Section 3.1.5 of the Pressure Equipment Directive (PED) 2014/68/EU. This section requires “procedures for identifying materials used in pressure resisting components from receipt to final testing”. There are also requirements for material conformity and records in Annex I, Section 4.3 of the PED. These will depend on what equipment you are manufacturing and what route to conformity you will be using. In practice this means ensuring that you can identify what materials have been used throughout the manufacturing process.

This article will explain how you can implement a material traceability register to help you achieve this.

What Does Material Traceability Mean in Pressure Equipment Manufacturing?

Material traceability is the ability to identify the material throughout the manufacturing process and associate it with the component/equipment it has been used in. Throughout the manufacturing process of your pressure equipment, you want to ensure a reliable link can be made between the material received from your supplier and the relevant pressure resisting component.

Some common traceability links would be:

Supplier material identification → Material certificate → Goods receipt record → Component identification → Manufacturing record → Final equipment record

Each of these will answer questions such as:

Supplier ID & Material Certificate – What heat/batch/material ID is the material?
Material Certificate – What specification and properties does the material have?
Goods In Record – What materials have been received and accepted?
Component ID – What piece of material has been allocated?
Manufacturing Record – Where and how has the component been processed/ manufactured?
Final Equipment – What vessel/pressure equipment has this material been used in?

If you are missing any of these links you may struggle to prove that the correct material has been used.

Material traceability is not a replacement for conforming to material requirements, inspecting and testing. It provides the evidence that links the processes to the correct material and equipment.

Why Material Records Can Become Disconnected

Often traceability issues occur during normal manufacturing processes.

Large Plates Cut Down

You may have received a steel plate with a heat number and ID. This is then cut down into various sections such as shell sections, reinforcement pads etc. If there has been no transfer of ID or reliable link to the new components, it may be difficult to determine which certificate relates to the component.

Multiple Deliveries

A vessel may be manufactured using a variety of different materials from different manufacturers or production batches. Each item may have its own certificate and ID system. If there isn’t a general material record with the ability to differentiate between each item, this won’t be sufficient.

Components Moved Around

Components may be moved from goods in, to cutting, forming, welding, machining and finally assembly. This can cause issues with losing ID if temporary labels are removed or components are stored together.

Defects During Manufacturing

If components are replaced or repairs are made to the component you may no longer have the correct records. You must ensure that you update the relevant records and confirm that the replacement or repair is to the correct requirements. This shows that it is best to ensure traceability is controlled throughout the manufacturing process.

How to Build a Material Traceability Register

A material traceability register is a controlled record which links the incoming materials to the components and equipment they have been used in. This should be created based on your manufacturing process. It can be created in a controlled spreadsheet, manufacturing system or other documented system.

Create Unique IDs

Set out a system for identifying your project and components.

For example, if you were manufacturing a pressure vessel for a customer you may use the following:

Project: BT-PV-026
Equipment: V-026
Incoming Plate Ref: PL-004
Cut Shell Component: V-026-SH-01

Recommended Fields:

Field	Information to record
Project number	Unique reference for the customer order or manufacturing project
Equipment identification	Vessel number, piping line number or other equipment identifier
Material description	Plate, pipe, flange, fitting or other component
Material specification	Applicable grade and product specification
Supplier	Name of the material supplier or manufacturer, as relevant
Heat or batch number	Original material identification, where applicable
Certificate reference	Unique reference to the applicable material documentation
Receiving inspection	Acceptance status and inspection record reference
Component identification	Unique identifier assigned to the cut or processed component
Transfer record	Reference showing how original identification was retained or transferred
Production reference	Drawing, cutting list, fabrication record or other applicable record
Current location or status	Available, issued, processed, rejected or otherwise controlled
Verification status	Reviewed, incomplete or requiring corrective action

A Practical Example: Tracking a Pressure Vessel Shell Plate

Let’s say you are a manufacturer in Bhutan and you are manufacturing a welded pressure vessel for an industrial customer. You have received a steel plate to use in your shell. This has a certificate stating what specification and heat number it is.

Step 1 – Record Incoming Materials

The goods in inspector will check the plate has been received to the correct purchase spec and relevant documentation. You will record what material you have received from your supplier, what type of material it is, what ID it has, what certificate it has and the outcome of the goods in inspection.

If there is a discrepancy you should put the material into your controlled process until it has been determined if it is acceptable.

Step 2 – Assign to Project

Once the material has been accepted it can be assigned to the relevant equipment order. In your register you will now have a link from the incoming material to the equipment ID and what material has been approved.

Step 3 – Record Cutting

When the plate is cut into shell sections you will have a cutting record stating what plate it came from. If there has been a transfer of ID you will record what ID has been transferred and ensure it has been verified.

Step 4 – Link to Fabrication

The shell sections will be linked to the relevant fabrication drawings and records. If applicable they will also be linked to the welding, inspection and any heat treatment specified.

Step 5 – Final Verification

Before the vessel is finalised you will want to check that you can trace the shell components back to the material records and any changes have been recorded. Your final record should allow someone authorised to trace back from the material certificate to the equipment and vice versa from the finished component to the material documentation.

Example Traceability Table

Material record	Component record	Production reference	Verification
Plate heat H-701; certificate MC-101	V-026-SH-01	Cutting record CUT-026-01	Identification transfer verified
Plate heat H-701; certificate MC-101	V-026-SH-02	Cutting record CUT-026-01	Identification transfer verified
Flange batch F-214; certificate MC-118	V-026-FL-01	Assembly record ASM-026-03	Batch-to-component link checked

Controlling Material Identification During Cutting and Fabrication

Ensure traceability can be achieved once materials have left the store.

ID Transfer Process

If the original ID is going to be lost or not accessible you should have a process in place to ensure the material can still be identified. Depending on the material, manufacturing process and specification you may have approved marking systems, controlled labelling, component mapping or something else to help identify the material.

This process should identify:

When the ID needs to be transferred
Who can transfer the ID
What original ID needs to stay
How the new ID will link to the original material
Who will verify the ID transfer and how it will be recorded

This should not damage the material or affect its fitness for service.

Controlled Storage & Handling

Materials and components should be stored and handled to ensure they aren’t confused with other similar materials. Using specific storage areas, clear status labels, controlled issue records and checks before issuing to production can help. If the components cannot be marked, you should have a reliable process in place to ensure they can still be identified throughout the relevant manufacturing process.

Compatible IDs

Your material register, cutting list, component drawing and fabrication records should have compatible IDs. If the component ID changes, ensure that the relevant records are updated. Don’t use manual notes or casual communication within the workshop.

Managing Mixed Batches and Material Substitutions

With more complex projects you need to take extra care as the materials may look similar but have different specifications.

Multiple Batches

If the relevant traceability requirements require you to identify the material source, each batch/heat should still be identifiable. Don’t combine different sources under a general description if you are unable to identify what material has been used in a component. If there are multiple sources of material in one assembly, ensure that your component mapping/register can identify the relevant source for each component.

Material Substitution

Don’t assume a replacement material is acceptable just because the dimensions look suitable or the grade name looks similar. Ensure that the proposed material has been assessed against the design, material specification and relevant requirements. Any engineering review, approvals and updates to documentation should be completed before using it. Ensure that the original record is kept in your register and that the approved change is noted.

Rejected Components/Replacement

If a component has failed the inspection it should be noted as rejected so it cannot be accidentally reintroduced into production. If you are replacing a component ensure that the material record states what the replacement source was and it is linked to the updated production records. This helps ensure that you have a consistent record of what has been manufactured.

How to Verify Traceability Records Before Final Testing

Ensure that you have a plan in place to check your traceability records before final testing.

Three Way Verification

A simple way to verify is to check the following:

Physical ID – What ID is marked on the material/component or identified via the controlled ID system?
Material Documentation – What ID is identified on the relevant material certificates and goods in records?
Manufacturing Records – What component and final equipment does the manufacturer identify as using this material?

All three should match. If they don’t then investigate and resolve the issue using your controlled non-conformance process.

Example Traceability Checklist:

Check that the required documentation is available
Check that the material specification matches the approved requirement
Check the heat/batch/other ID
Check that the component ID and ID transfer records are correct
Check that the material records match the cutting list and production drawings
Check that any material substitutions are documented
Check that rejected/unverified materials have been correctly controlled
Check that the relevant links are available for the final equipment

This can be a useful tool to help you internally verify. It doesn’t replace the requirement to inspect, test and conform to requirements.

Correct Any Issues

If you cannot identify the material don’t make up any information to fill in the gaps. Don’t assume that a certificate relates to a component because the grade looks similar. Investigate using your original records and objective evidence. Any disposition should follow the relevant technical and regulatory requirements.

Digital Tools for Managing Material Records

A spreadsheet can be sufficient for a small controlled manufacturing process. Ensure that you have reliable ID, the records are controlled and you can access the relevant documentation. As your manufacturing becomes more complex you may find a dedicated material management or manufacturing execution system helpful.

Some useful features:

Unique IDs for projects, materials and components
Link to certificate files and goods in records
Controlled updates with revision history
Record material issues, transfers and replacements
Search by heat number, certificate number or equipment number
Identify any missing records before finalising
Back up and controlled access

Example Simple Digital System

An employee will record the plate in goods in with the certificate reference. The cutting operator will record the components produced. The production team will link the components to the fabrication records. The responsible reviewer will check that the links are correct before closing out the equipment dossier. This will highlight any missing information. Digital tools are only useful if the employees are following the process and the records are accurately reflecting the manufacturing process.

Common Material Traceability Errors

Certificates Stored But No Links To Components – Having a folder full of certificates won’t prove what materials have been used in the equipment. Ensure that you have links to the components.

No ID Transfer During Cutting – Ensure you have a plan in place for transferring ID before the original ID is lost.

General Record For Multiple Batches – Ensure that you keep the differences to identify what the actual source material was for each component.

No Record Of Substitutions – Ensure that the replacements have been technically assessed, authorised if required and are shown in the relevant records.

Uncontrolled Spreadsheet Updates – Ensure that your records are controlled so any changes can be tracked.

Checking Documentation At Final Inspection – Ensure that you check that the materials have the correct ID at goods in, cutting, fabrication and other relevant stages. This will make it easier to resolve any discrepancies.

Frequently Asked Questions

What is PED Material Traceability?

PED Material Traceability is the controlled identification of materials used in pressure resisting components. This should be achieved from receipt through to final testing. This is covered in Annex I, Section 3.1.5 of the PED.

Is there a standard spreadsheet for PED Material Traceability?

There is not a universal spreadsheet for all manufacturers to use. You need to ensure that you have suitable processes in place to meet the requirements. A traceability register is a good way to organise your evidence.

Is a Material Certificate Enough To Prove Traceability?

No. You need to ensure that there is a reliable link between the certificate, the material received, the relevant component and the final equipment. The certificate and ID records compliment each other.

Do All Pressure Equipment Manufacturers Need An EN 10204 Type 3.2 Certificate?

No. This will depend on the PED requirements, material specification, equipment and route to conformity. Main pressure bearing parts in Categories II, III and IV require a certificate of specific product control (Annex I, Section 4.3). This is subject to the note regarding a suitably certified material manufacturer’s quality assurance system. You shouldn’t assume that all materials will require a Type 3.2 certificate for all PED projects.

Conclusion

To have reliable material traceability you need to ensure that there is a link between what is stated on the material documentation and what material it has actually been used in. By having a controlled register, documented ID transfer, component records and timely verification this can be made easier for Bhutanese pressure equipment manufacturers.

The best way to do this is to ensure that traceability is maintained throughout the manufacturing process. Ensure that each relevant material has a link to its source documentation, each component has a reliable ID and changes have been recorded and reviewed. PED material traceability is one part of proving conformity. You must ensure that you meet the relevant material, design, manufacturing, inspection and conformity requirements for the equipment.

Need guidance on pressure equipment material documentation or conformity assessment?

First Welding Certification Pvt Ltd (PRVÁ ZVÁRAČSKÁ, a.s.) can help you explore the relevant welding quality and certification requirements for your application.