Elbow

Butt-welding elbow: 90° and 180° return in long (1.5D) or short (1.0D) radius, 45° long radius. Centre-to-end from ASME B16.9, machined B16.25 weld bevels or welded-on weld-neck flanges. The work point (tangent intersection) is the origin; turn sets whether end B goes up, down or sideways.

Installation

Copies piping/elbow.tsx and the shared lib/ into src/components/deck-twin/. Needs three, @react-three/fiber and @react-three/drei. See installation for the manual route.

Usage

import { Canvas } from '@react-three/fiber'
import { OrbitControls } from '@react-three/drei'
import { Stage } from './components/deck-twin/lib/stage'
import { Elbow } from './components/deck-twin/piping/elbow'

export default function Scene() {
  return (
    <Canvas shadows camera={{ position: [8, 5, 9], fov: 35 }}>
      <Stage>
        <Elbow />
      </Stage>
      <OrbitControls makeDefault />
    </Canvas>
  )
}

Props

P&ID

On P&IDs a change of direction is just a corner in the line; elbows are only drawn on isometrics and GA drawings, as a bend or a corner with a short tick at each weld.

ISO 6412 / isometric convention (fittings are not shown individually on P&IDs)

Take the angle and radius (LR / SR) from the isometric or the piping class, not the P&ID. Treat a P&ID corner as an elbow only when building a 3D route.

Piping class / isometric bill of materials (ASME B16.9) fields and the props they set

Nominal sizenps

Wall scheduleschedule

Angleangle

Radius (LR / SR)radius

End connectionends

Flange ratingrating

Service codeservice

Typical suppliers

Weldbend. The geometry is generic and sized from public standards. It is not vendor CAD.

For agents

Machine-readable entry with props, ranges, defaults and ports:

Or fetch /r/elbow.json, or copy a ready-made instruction:

Add the Deck Twin "Elbow" component to this project. Run `npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz add elbow` (it copies the file and the shared lib into src/components/deck-twin/), then `npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz info elbow` for its props, ranges and ports. Render <Elbow /> inside a React Three Fiber <Canvas shadows>, wrapped in <Stage> from src/components/deck-twin/lib/stage. Set props from my data (metres, NPS in inches, ASME class) and leave the rest at defaults. Install three, @react-three/fiber, @react-three/drei and @types/three if they're missing. Full guide: https://decktwin.com/skill/SKILL.md