Lap-joint flange and stub end

Loose ASME B16.5 lap-joint backing flange on a stainless stub end. The flange is flat with a radiused bore edge so it clears the stub-end fillet and turns freely to line up the bolt holes. The stub end is B16.9 long pattern or MSS SP-43 short pattern, with its lap diameter matched to the raised face. The serrated lap face is the gasket face (port A). An optional pipe can be butt-welded on.

Installation

Copies piping/lap-joint-flange.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 { LapJointFlange } from './components/deck-twin/piping/lap-joint-flange'

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

Props

P&ID

In section: a stub end (pipe with a flared lap at the face) with a loose backing flange sitting behind the lap, not welded to the pipe. On P&IDs a short bar like any flange.

tag LJASME B16.5 flange types drawn in half-section (GA / isometric detail convention); on P&IDs every flange is a short bar; MSS SP-43 stub end

The loose ring behind a lap identifies it. Used on stainless or alloy lines where the backing flange can be carbon steel, and where bolt holes must be lined up after welding.

Piping class / flange bill of materials (ASME B16.5, MSS SP-43) fields and the props they set

Nominal sizenps

Pressure classrating

Stub-end scheduleschedule

Stub-end patternpattern

Backing flange materialbacking

Tag numbertag

For agents

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

Or fetch /r/lap-joint-flange.json, or copy a ready-made instruction:

Add the Deck Twin "Lap-joint flange and stub end" component to this project. Run `npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz add lap-joint-flange` (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 lap-joint-flange` for its props, ranges and ports. Render <LapJointFlange /> 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