PipingToolset for Claude, ChatGPT and Codex

B31 calcs you can reproduce and defend in review, with the assistant you already use. The assistant does the interview. A script does the math. You read the table.

Six piping engineering skills, one plugin, installable in Claude Code and Claude Cowork, in ChatGPT and OpenAI Codex, and in any assistant that reads the Agent Skills format (Cursor, GitHub Copilot, Gemini CLI and others), from the people who build the free calculators at pipingtoolset.com. Written and maintained by a practicing piping engineer at Flexible Piping Solutions LLC. The same folder carries both a Claude manifest and an Agent Plugins 1.0 manifest, so the install you pick changes nothing about what the skills do.

The plugin is free and the skills run entirely on your side. An optional Engineering Data connector can hand the assistant a cited code-table value instead of making you look it up, within what your pipingtoolset.com plan covers. Every skill works without it.

	Claude	ChatGPT / Codex
Landing page	pipingtoolset.com/claude/	pipingtoolset.com/openai/
Install file	piping-toolset.plugin (drag into Cowork)	codex plugin marketplace add pipingtoolset/pipingtoolset-claude
Invoke	/piping-toolset:pipe-stress-check or name it in Cowork	$pipe-stress-check in Codex, name it in ChatGPT
Manifest read	.claude-plugin/plugin.json	plugin.json (Agent Plugins 1.0, extensions.com.openai)
Engineering Data connector	Declared by the plugin in .mcp.json	Not declared; you add it by hand (see Add the connector)

Skill	What it does
pipe-stress-check	Sustained, occasional and expansion hand checks, the f factor by edition, which document supplies the SIFs, the formal-analysis exemption, support spans and spring variability, the ASCE 7 occasional-load build and the ASD position, owner practices (PIP PNC00004 / PNC00001 / RECE002), and a cold-eye review protocol for a CAESAR II or AutoPIPE run or a received calc package: traceability chain, modelling and documentation findings with severity, verdict recommendation. Replaces stress-screening (0.10.0); its eight engine modules are unchanged
load-case-builder	Complete B31.1 / B31.3 static load case sets for CAESAR II and AutoPIPE, generated symbolically so references never go stale, with a QC gate and a report extraction matrix
pipe-support	Pipe support assemblies (arm, column, welds, bolts, base plate, anchors, pier) checked for CAESAR II restraint loads: ASCE 7-22 combinations, AISC 360-22, ACI CODE-318-25 Chapter 17 (ACI 318-19 selectable) and AWS D1.1 detailing, with a PE-style review, ranked code-passing alternatives (lighter, less field work, stocked sizes) and an engineer-ready calc report. The pipingtoolset.com PiperSTR engine, verified against a published PiperSTR report value for value
stress-import	Any piping source into an analysis-ready CAESAR II or AutoPIPE model with every support on a node: PDF stress isometrics transcribed and built in exact fractions, Revit / Fabrication PCF exports de-duplicated, re-vocabularied and healed, Navisworks NWC hangers and trapezes mined and snapped to the centreline, rule-placed supports, a pre-import checker (pieces and anchors, free ends, slivers, supports off node, spans over the project table), an SVG plot, the AutoPIPE translator's bend and loop-closure checks (E726-15, W726-8, E751-1), and the CAESAR II neutral-file repair after APCF import (node bands per line, T/P, fluid density, anchor codes) with an independent proof. Replaces iso-to-pcf (0.10.0); its builder and validator are unchanged
nozzle-load	Piping forces and moments on equipment nozzles, checked the way the vendor will: API 610 Table 5 and Annex F for pumps, the API 617 / 611 / 612 and NEMA SM-23 combined form for compressors and turbines, API 660 / 661 / 560 per-component and header-sum checks for exchangers and heaters, API 650 Annex P ordinates for tank shells, and the PVP2011-57100 method as the default for a pressure vessel with no API allowable. The user reads every table row; the script applies the scaling rules and the ratios. PIP RECE002 design-stage margins as an owner practice
bolted-flange

This is the beginning of the README. Read the rest at the original. Read the full README ↗