Restriction orifice

Restriction orifice for fixed flow limiting or pressure breakdown. Single stage: a stainless paddle plate between two weld-neck flanges with gaskets and through studs. The handle carries the tag and bore, and there is a telltale hole. Multi-stage: a flanged Sch 80 spool with two to six internal welded plates, each bore larger than the last for the expanding gas, with weld bands and a tag plate. beta sets the first bore. Single-plate ports are the plate faces; multi-stage ports are the spool flange faces.

Installation

Copies piping/restriction-orifice.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 { RestrictionOrifice } from './components/deck-twin/piping/restriction-orifice'

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

Props

P&ID

A plate across the line (one bar, or a bar with the bore gap at the centre) between two flange bars, tagged RO or FO with the bore size, and no transmitter or taps; multi-stage ROs show several plates in a row.

tag ROISA FOISA ROISO 10628-2 / PIP PIC001 / ISA 5.1 (RO / FO)

With two taps to an FT bubble it is an orifice-flowmeter; without taps it is a restriction orifice. Common downstream of a BDV, in minimum-flow bypasses and on purge lines.

Restriction orifice datasheet (ASME MFC-14M / ISO 5167-2 plate geometry) fields and the props they set

Line sizenps

Flange ratingrating

Number of stagesstages

Bore ratio (d/D)beta

Supplied with flangesflanges

Tag numbertag

For agents

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

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

Add the Deck Twin "Restriction orifice" component to this project. Run `npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz add restriction-orifice` (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 restriction-orifice` for its props, ranges and ports. Render <RestrictionOrifice /> 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