Product standards matter because they turn a claim into something a buyer can check. These are the standards our products are built and rated to, and what each one actually governs.
Product standards
| Standard | Applies to | What it governs |
|---|---|---|
| ISO 10380 | Corrugated metal hose and hose assemblies | Construction, dimensions, pressure rating, cycle-life classification and the test methods behind them. The international reference for our braided corrugated range. |
| ISO 15465 | Strip-wound (interlock) metal hose | Construction and classification of strip-wound hose. The counterpart standard for our interlock range. |
| BS 6501 Part 1 | Corrugated metal hose assemblies | The British specification for corrugated hose assemblies, still called for on many project specifications. |
| EN 14917:2021 | Metal bellows expansion joints for pressure applications | Design, manufacture, testing and marking of expansion joints. Our bellows are designed to this edition. |
| EJMA, 11th Edition | Expansion joints | The Expansion Joint Manufacturers Association standards — movement, stress and fatigue methodology. |
Design and system codes
| Code | Where it applies |
|---|---|
| EN 13445 | Unfired pressure vessels, where the component falls within that scope |
| EN 13480 | Metallic industrial piping |
| ASME B31.1 | Power piping |
| ASME B31.3 | Process piping |
| PED 2014/68/EU | The Pressure Equipment Directive, which governs equipment placed on the European market. We design to EN 14917, which is the harmonised standard behind it; where a project needs CE marking, the conformity assessment route has to be agreed before we quote |
Tell us at enquiry which code the project runs under. It rarely changes the physics but it frequently changes the acceptance criteria and always changes the documentation.
Management system certification
Essem Works holds three certifications, issued by TÜV Rheinland. Their scopes are held with TÜV Rheinland, and the certificate numbers are below.
| Standard | Certificate number | Issued by |
|---|---|---|
| ISO 9001:2015 — Quality management | 01 100 2437759 | TÜV Rheinland |
| ISO 14001:2015 — Environmental management | 01 104 2537285 | TÜV Rheinland |
| ISO 45001:2018 — Occupational health & safety | 01 213 2537285 | TÜV Rheinland |
Each certificate carries its own scope statement, printed on the certificate itself. Certificate copies travel with a pre-qualification pack; ask at enquiry and they come with the quotation.
Material and welding documentation
| Document | What it is |
|---|---|
| EN 10204 2.2 | Test report — non-specific test results issued by the manufacturer |
| EN 10204 3.1 | Inspection certificate — specific test results, validated by the manufacturer's authorised inspection representative |
| EN 10204 3.2 | Inspection certificate validated additionally by an independent inspector or the customer's representative |
| Welder qualification | Welders and procedures qualified for the pressure-retaining welds we make |
| PMI | Positive material identification on the finished assembly, where required |