Getting the stud length and the first few installation steps right sets up the whole tightening sequence. This page summarizes PCC-1-2026 Sections 5 and 9. A printable PDF (PB-TD-217) is below. Values are for reference; confirm against the current edition of the governing standard. Send us your bolting list for a quote or call (281) 581-0176.
Related: Stud Bolt Length Calculator · Flange Tightening Pass Table · All technical docs
Stud length (Sec. 9)
- Length must allow for washers, nuts and protrusion.
- For tensioning, allow at least 1D past the nut on the tool side.
- Avoid excessive protrusion. It invites corrosion damage to exposed threads and gets in the way of tools.
- Use the Stud Bolt Length Calculator or the B16.5 chart.
Before assembly (Sec. 5.3–5.4)
- Check that each nut runs freely by hand past where it will sit.
- For tapped holes, check the thread by hand to full depth.
- Nut bearing faces should be smooth. Coating thicker than about 0.005 in. on bearing surfaces can be a problem.
- Use through-hardened washers if washers are used.
Installing (Sec. 9(b))
- Put all marked stud ends on the same side, with nut markings facing out.
- Leave minimal protrusion at one end and any excess at the other.
- Lubricate per Sec. 8 (see How to Lubricate Flange Bolting).
- Hand tighten, then snug to 10–20 ft-lb, but no more than 10% of the target bolt load.
- The nut should engage its full thickness. Less may be acceptable after construction with an engineering review.
References: ASME PCC-1-2026, Guidelines for Pressure Boundary Bolted Flange Joint Assembly. Summaries are paraphrased; clause numbers refer to ASME PCC-1-2026 unless noted. Patriot Bolt manufactures bolting and does not perform bolting, training or joint assembly services.