Riser top section

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Export or import riser where it reaches the topsides. Below the deck (y < 0, down to length) the coated riser runs through split jacket clamps on brackets and splash-zone sheathing placed from airGap. At the deck a forged hang-off collar sits on beams; above it come a monolithic insulating joint, the riser ESDV (full-bore ball valve with a fail-close spring-return actuator) and a riser pressure gauge and transmitter, and a 5D piggable bend to a horizontal B16.5 topside flange.

API RP 2RDAPI 6DASME B31.4 / B31.8ASME B16.5ISO 13623

Drag to orbit, scroll to zoom

Parameters

Riser size

Class

Length below deck– m

Deck above MSL– m

Riser ESDV

Insulating joint

Topside run– m

ESDV tag

Installation

$npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz add riser

Copies wellhead/riser.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 { Riser } from './components/deck-twin/wellhead/riser'

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

Props

Prop	Type	Default	Range
`nps`	number (NPS, in)	null
`rating`	150 \| 300 \| 600 \| 900 \| 1500 \| 2500	null
`length`	number (m)	null	2 – 80
`airGap`	number (m)	null	8 – 40
`esdv`	boolean	null
`insulatingJoint`	boolean	null
`run`	number (m)	null	0.5 – 4
`tag`	string	null
`...group`	position, rotation, scale…

P&ID

The topsides line turning down through the deck to sea level and below, with the riser ESDV (actuated valve with an S box) above the deck, an insulating joint (two close bars with a gap) and an off-page note "to / from subsea pipeline"; the sea level is often drawn as a wave line.

ISA ESDVISA PTISA TTISO 10628-2 / PIP PIC001 / pipeline P&ID convention

An open-ended pipe hanging into the sea (pump or sump) is a caisson. Pipeline pig traps sit just upstream on the topsides.

Riser design basis / line list (API RP 2RD, ISO 13623) fields and the props they set

Riser sizenps

Flange ratingrating

Length below decklength

Air gapairGap

Topsides ESDVesdv

Insulating jointinsulatingJoint

Tag numbertag

Typical suppliers

Subsea Energy Solutions (hang-off clamps). 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:

$npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz info riser

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

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