# Pressure Relief Device Inspection Register Worksheet

> Source: https://netray.co/tools/pressure-relief-device-inspection-register-worksheet
> Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems.
> Section: Free Tools

## Short answer

An editable register of relief valves and rupture discs with set pressure versus MAWP, test dates and status, exportable to Excel.

## Category

maintenance

## Industry

Chemicals & Process Manufacturing

## Audience

- Maintenance planner
- Inspection engineer
- Process safety engineer

## Tool

**Kind:** worksheet

**Mode:** editable

**Columns:**

#### Device tag

**Key:** tag

**Type:** text

#### Protected equipment

**Key:** equipment

**Type:** text

#### Device type

**Key:** type

**Type:** select

**Options:**

- Spring PSV
- Pilot-operated PSV
- Rupture disc
- Vacuum relief
- Conservation vent

#### Set pressure

**Key:** set

**Type:** number

**Unit:** psig

#### Equipment MAWP

**Key:** mawp

**Type:** number

**Unit:** psig

#### Set as % of MAWP

**Key:** ratio

**Type:** number

**Expr:** set / mawp * 100

**Format:** decimal

#### Test interval

**Key:** interval

**Type:** number

**Unit:** years

#### Last test date

**Key:** last

**Type:** date

#### Status

**Key:** status

**Type:** select

**Options:**

- In service
- Due soon
- Overdue
- Removed for repair
- Out of service

#### Notes

**Key:** notes

**Type:** text

**Rows:**

**Tag:** PSV-2101

**Equipment:** Reactor R-210

**Type:** Spring PSV

**Set:** 150

**Mawp:** 165

**Interval:** 5

**Last:** 2024-03-14

**Status:** In service

**Notes:** Discharge to flare header

**Tag:** PSV-2154

**Equipment:** Tank T-215 (blanket gas)

**Type:** Conservation vent

**Set:** 1

**Mawp:** 2.5

**Interval:** 3

**Last:** 2023-09-02

**Status:** Overdue

**Notes:** Schedule with outage

**Tag:** RD-3302

**Equipment:** Heat exchanger E-330

**Type:** Rupture disc

**Set:** 90

**Mawp:** 100

**Interval:** 2

**Last:** 2025-06-20

**Status:** In service

**Notes:** Replace with new disc, check burst tag

**Tag:** PSV-4010

**Equipment:** Steam header

**Type:** Pilot-operated PSV

**Set:** 175

**Mawp:** 200

**Interval:** 5

**Last:** 2022-11-08

**Status:** Due soon

**Tag:** PSV-5207

**Equipment:** Solvent receiver V-520

**Type:** Spring PSV

**Set:** 45

**Mawp:** 50

**Interval:** 5

**Last:** 2024-08-27

**Status:** In service

**Notes:** Back pressure checked

**Totals:**

#### Devices registered

**Key:** tag

**Agg:** count

**Format:** integer

#### Highest set % of MAWP

**Key:** ratio

**Agg:** max

**Format:** decimal

#### Average interval (years)

**Key:** interval

**Agg:** avg

**Format:** decimal

**Summary:**

#### Highest set pressure as % of MAWP

**Key:** worst_ratio

**Expr:** max_ratio

**Format:** decimal

**Primary:** true

**Description:** A set pressure above 100% of MAWP is not normally allowed for a single device on a vessel

#### Average test interval (years)

**Key:** mean_interval

**Expr:** avg_interval

**Format:** decimal

**Notes:** Illustrative data only. Intervals and acceptance rules come from your inspection program, risk-based inspection basis and applicable codes (for example API 576 practices or local pressure equipment law). Use the status column manually or combine with a date check in your Excel export.

## Content

**Intro:** Relief devices are the last line of defence against overpressure, and an auditor will ask to see the register. This worksheet gives you a clean table for tags, set pressures, test intervals and status that exports to Excel.

**Sections:**

#### How to use the worksheet

**Body:** Add a row for each pressure relief valve, rupture disc or vent on your site. Enter the set pressure and the protected equipment's maximum allowable working pressure. The sheet calculates the set pressure as a percentage of MAWP so mismatches stand out. Enter the last test date and the interval, mark the status, then export to Excel to add your own due-date formulas, filters or conditional formatting. Keep the exported file under document control or load it into your maintenance system.

#### What the ratio tells you

**Body:** The set pressure should not exceed the MAWP of the protected equipment, and is normally set with some margin below it. A ratio near 100% leaves little room for accumulation, while a very low ratio can cause nuisance lifting at normal operating pressure. Compare with the normal operating pressure too: a common practice keeps operation at or below roughly 90% of set pressure for spring valves, though your design basis governs.

**Bullets:**

- Over 100%: stop and check the data or the design
- 90% to 100%: verify accumulation allowance in the design basis
- Well below operating margin: expect leakage or chatter

#### Test intervals

**Body:** Intervals depend on service, corrosion rate, fouling history and local law. Clean service valves often run longer intervals than polymerising or corrosive service, and rupture discs are usually replaced on a fixed schedule or per manufacturer. Record the basis for each interval and shorten it if as-found tests show failures. Track as-found results in notes so the history supports any future extension.

#### Common mistakes

**Body:** Frequent failures include devices missing from the register, copied set pressures that no longer match the current design after a change, isolation valves left closed under a relief device, and tags that differ between the register and the field. Verify the register against the P&IDs after every management of change.

**Cta:** Netray can help sync inspection registers with ERP maintenance plans so due tests generate work orders automatically.

**Faq:**

#### How often should relief valves be tested?

**Answer:** It depends on service, history and law. Many chemical sites use intervals between one and ten years based on risk-based inspection. Corrosive or fouling service usually needs shorter intervals.

#### Can set pressure equal MAWP?

**Answer:** Often the set pressure can be equal to MAWP for a single device, with allowed accumulation above it, but design codes and your engineers decide. Never exceed MAWP with the set pressure.

#### What is an as-found test?

**Answer:** A test of the device in the condition it was removed, before any cleaning or repair. It shows whether the valve would have opened at the right pressure in service and guides the interval.

#### Does this replace a CMMS?

**Answer:** No. It is a quick register and export tool. For scheduled work orders and history, load the data into your maintenance system or ERP.

## Search terms

pressure relief valve inspection register, PSV inspection schedule excel, relief valve register template, safety valve test log, PSV test record, relief device inventory, rupture disc register, pressure safety valve tracking

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