
Plain Lab · logbook
Boiler Operation Log
Sixty boiler operation records ruled into six columns, and twenty-nine lined pages for what a shift note needs to say.
Specification
- Trim
- 148 × 210 mm · 5.827 × 8.268 in
- Pages
- 100
- Leaves
- 50
- Sheets
- 25
- Signatures
- 5 × 20pp
- Spine
- 5.72 mm
- Paper
- white
- Ruling
- lined
- Ruling pitch
- 7.14 mm · 20.25 pt · 9/32 in
- Rows per page
- 24
Sixty pages, six columns to a page: date, time, pressure, feedwater, blowdown, initials. A pressure reading with no initials against it is a number nobody can stand behind six months later, when an inspector asks who was on shift.
After the log come twenty-nine pages ruled college, twenty-four lines a page, holding what a column cannot: why a blowdown ran long, what the water treatment contractor said about a foaming trip, who signed the boiler back on after it.
It does not print your operating pressure or your blowdown interval. Those are set by the boiler code you are licensed under and the insurer covering the vessel, and they differ by jurisdiction and by boiler. The book gives you somewhere to write the reading down, not the number to write.
What is inside
- Log
- 60pp
- Six columns fixed, so a pressure reading always carries a name.
- Notes
- 29pp
- College-ruled, for what happened between two numbers on the log.
- Reference
- 6pp
- Conversion tables computed from definitions, plus emergency numbers checked against two independent sources.
- Last leaf
- 1pp
- A pen test page, printed on purpose so it is not lost to one anyway.
The film
Page by page
A vertical film from our own bench — this page contacts nobody's server to play it, and downloads nothing until you press play.
Real pages


Made at the Hibrkraft bindery, Bogor · about the maker
Books that sit alongside it
- Cold Chain Temperature LogWorks alongsideshares field-work
- Job Notes InsertWorks alongsideshares field-work
- Water Treatment LogWorks alongsideshares field-work
- Welding LogWorks alongsideshares field-work
Questions
What are the six columns?
Date, time, pressure, feedwater, blowdown, initials.
How big is it?
A5, 148 x 210 mm, 100 pages, 5.72 mm across the spine.
Is it dated?
No. Start it on the first shift you log.
Does it print my operating pressure or blowdown interval?
No, and that is deliberate. Those figures come from the boiler code and the insurer covering the vessel, they differ by jurisdiction, and a printed book cannot be corrected. The columns give you a place to record yours.
What ruling are the notes pages?
College, 7.14 mm, twenty-four lines to an A5 page.
Who initials the log?
Whoever was on shift when the reading was taken. The column exists so that question has an answer.
As long as we supply oxygen, so long can we carry on the combustion of the iron, until the latter is consumed.


