Flangemate — Controlled Bolting Calculator

Joint

Standard

Size (NPS)

Class / Rating

Facing

Bolting

Bolt spec

Grade

Lubricant / anti-seize

Target basis

Target (% yield)

Manual torque · per bolt

— ft·lb

Bolt load

Bolt stress—

% of yield—

Bolt load (per stud)—

Root area—

Tensile area—

Elongation—

Wrench size—

Flange & stud

Stud count—

Stud diameter—

Threads / inch—

Yield strength—

Flange OD—

Bolt circle—

Flange thickness—

Grip length—

Effective length—

Stud length required—

📋Save this joint and issue a stamped turnover report — and keep every bolt-up on record — with Flangemate Pro.See Pro

Hydraulic tensioning

Tensioner tool

Tool Pressure Area

Spacer thickness (in) ▸

Grip length (in)

Puller engagement

Load-cell coverage

Load transfer factor—

Cross-load factor—

A pass — over-pull—

B pass — 100%—

At 50% coverage (tensioners on alternating studs) the A pass over-pulls by the cross-load factor to land at 100% after the B studs relax it; tap “Tightening pattern” for the A/B map. At 100% coverage (a cell on every stud) it’s a single 100% pull. Max tool pressure / load limits shown when selected.

Default torque is computed on the root area (the app's standard basis). Values reproduce the Flangemate app engine exactly. This is a reference tool — verify against the governing joint spec, gasket data sheet, and your site's bolt-up procedure (e.g. ASME PCC-1) before field use.

👷Working as a crew? Pro routes joints through QC sign-off, locks the requirements to the field, and attributes every entry to the person who did it.See Pro