AI for tank and pressure vessel fabricators, tested on RFQs your estimators already worked up.

Closed jobs show what right looked like. Every RFQ your estimators worked up has a sheet or estimate input behind it, and every vessel you shipped has a book that someone assembled by hand. Your reviewer can set a draft beside each one, on the same documents, and mark the differences.

The first question is which book governs. ASME Section VIII, Division 1, in its 2025 edition, covers design, fabrication, inspection, testing and certification of vessels above 15 psig and holds the rules for the U, UM and UV marks. API 650 sets minimum requirements for vertical, aboveground welded storage tanks, open-top or closed. API 620 is for large, welded, low-pressure tanks. UL 142 is limited to shop-fabricated atmospheric tanks for stable flammable and combustible liquids. AWWA D100 covers welded carbon steel tanks for water storage. Each one changes what an RFQ has to say and what your shop hands back at the end, so the test starts by naming which standard and edition a package really calls for.

A label on one job, a report on the next. UL says its Listing Mark is permanently fixed to the tank and carries the UL symbol, the word LISTED, a control number and the name of the tank construction, and that makers leak test every listed primary and secondary containment tank. A Section VIII vessel closes on a Manufacturer's Data Report instead. A shop that builds both keeps two kinds of closing file, and a sample can hold either.

Water systems write the code into their rules. The Texas Commission on Environmental Quality's construction notes for hydropneumatic tanks, revised in February 2019, want ASME Section VIII, Division 1 at 1,000 gallons and up, with a permanently attached ASME nameplate and an access port for inspection. Utah's R309-540-8 wants NSF/ANSI 61 certification and ASME certification on the same tank. A small water system's request can be as code-bound as a process plant's.

Chemical buyers answer to OSHA. Under 29 CFR 1910.119, the process safety management rule, pressure vessels and storage tanks are named as covered process equipment, the employer documents that equipment complies with recognized and generally accepted good engineering practices, and on new plants and equipment it must assure that what was fabricated suits the process. Those duties fall on the employer rather than the fabricator, and they are one reason a covered plant asks for the records it does.

Dairies and food plants bring other words. A 2025 Dairy Foods article lists insulated tanks, uninsulated tanks and silos among the equipment 3-A Sanitary Standards cover. One request may cite those next to a pressure code, another may give only a finish and a cleaning method. The draft keeps each customer's words, and your estimator decides what they mean for the job.

One limit covers both jobs. The proof of concept never touches your estimating, quality or ERP system or a live quote or data report. It never performs a design calculation, decides that a vessel meets a code, or signs or stamps anything. An estimator checks every specification sheet, and the certificate holder's quality staff and the authorized inspector make every code decision. Defense and aerospace work stays out. Nothing on this page is legal or engineering advice.