Tagging valves for records: tags, photos and simple digital IDs

1. What the tag must survive

A tag has one job. It carries a unique number from the valve to the record, and it must do so for years. Sun, rain, wash-down fluids, grease and repaint campaigns all attack markings in service.

No marking method survives every threat, and honest planning accepts this. Paint markers fade in strong sunlight. Adhesive labels lift in heat and in solvent. Wire-on tags come off during insulation work, and crews do not always refit them. Build the system expecting to repair markings, rather than trusting any marking for life.

Treat the marking as a maintained item, not a one-off task.

1. Stamp or engrave the number on corrosion-resistant metal where the design allows.
2. Fix tags so a technician can refit them without special tools.
3. Enter the number in the register before the tag leaves the store.

2. Tags, markers and machine-readable codes

Each method trades cost against durability and readability. Choose one primary marking and one backup, and keep the human-readable number central.

1. Stamped metal tags: corrosion-resistant stamped tags survive weather and wash-down well. They cost more and need a fixing that cannot work loose.
2. Paint markers: fast and cheap, but they fade in sunlight and vanish under repaints. Treat them as a backup marking only.
3. Engraved or stamped plates: they cannot fall off. Many sites forbid marking pressure-containing parts, so check the rules and the valve design first.
4. QR codes and barcodes: a scan can open the valve record directly. The code is useless once painted over or greasy, so it supplements the number, never replaces it.
5. RFID tags: they read through paint and grime without line of sight. They cost more, need readers, and still fail eventually like any tag.

3. Photographs that stay useful

Photos fail in a predictable way. A close-up of an untagged valve could be any valve on site, and after a few years nobody can say where it was. The fix is a standard set, taken the same way every time.

1. One wide shot showing the valve, its pipe run and enough surroundings to find it again.
2. One close-up of the tag, with the number readable.
3. One close-up of the stem and any injection fittings, so future crews know what is fitted.

Name each photo with the valve ID, and store it with the record rather than in personal phone albums. Keep the date visible or intact in the file. A short photo standard, written on one page, keeps different crews producing the same set. Photos record appearance, not condition, so note observations separately in the record itself.

4. The ID and the record it opens

A simple scheme is enough: area, then line, then valve number, with a new number for every valve. Never reuse the number of a scrapped valve, because its history will pollute the new valve's record.

The record behind each ID should hold the essentials: location, make, size, pressure class, service, the fittings fitted, and every work event with its date. When online injection work is done, record the compound, roughly how much went in, and how the valve responded, so the next crew can compare results over time. The full field list is covered in building a valve register, and the tagging scheme should follow your wider valve integrity management plan.

One discipline matters more than the tag choice. A note that a valve is passing is screening evidence only, unless a seat-leak test under agreed conditions supports it. The record should state which it is.

5. Keeping the link alive over years

Tags and records decay in known ways. Valves get replaced without updating the register, tags vanish under insulation, and photo folders drift away from the record. Accept this and audit: walk down a sample of valves each year and check tag, photo and record against each other.

Tagging cannot tell you a valve's condition, and a well-kept record of a neglected valve is still a record of neglect. If your register is new or unreliable, the honest next step is evidence: a walk-down condition survey that matches every valve to its line, verifies the fittings, and sets a baseline for each one. Our valve survey teams do this work, and the output feeds straight into a register.

From there, the tagging scheme becomes the backbone of a maintenance programme started from zero, where every injection, test and observation lands against the right valve.