This post provides a full, implementable reference for Malaysia’s pressure pipe, fitting, and appurtenance based on MS ISO 2531 / EN 545, MS EN 12201, MS 628, and MS 1965 practice.
Nomenclature: DN stands for Nominal Diameter.
Pipe Standards and Sizes #
Ductile Iron (DI) #
- Standard: MS ISO 2531 / EN 545
- PN Classes: PN 10 / 16 / 25
- Joint: Push-on (TYTON), flanged at nodes
- DN (mm):
80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500,
600, 700, 800, 900, 1000, 1200
HDPE (PE100) #
- Standard: MS EN 12201
- SDR/PN: SDR 11 (PN 16), SDR 17 (PN 10)
- Joint: Butt fusion / electrofusion / stub-end + backing flange
- DN (mm):
20, 25, 32, 40, 50, 63, 75, 90, 110, 125, 140, 160,
180, 200, 225, 250, 280, 315, 355, 400, 450, 500, 560, 630
PVC-U #
- Standard: MS 628 / JKR SPJ F4.1
- PN Classes: PN 6 / 9 / 12 / 15
- Joint: Socket
- DN (mm):
63, 75, 90, 110, 125, 140, 160, 180, 200, 225, 250, 280, 315
DN > 315 are not locally available.
Mild Steel / MSCL #
- Standard: MS 1965 / EN 10224
- PN Classes: PN 10 / 16 / 25
- Joint: Butt-weld, flanged at appurtenances
- DN (mm):
80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500,
600, 700, 800, 900, 1000, 1200
Fittings (with Angles and DN Sizes) #
Elbows #
| Material | Angles | Radius | DN (mm) |
|---|---|---|---|
| HDPE | 45°, 90° | moulded / fabricated (>315) | 20–630 |
| PVC-U | 45°, 90° | moulded | 63–315 |
| DI | 11.25°, 22.5°, 45°, 90° | standard | 80–1200 |
| MSCL | 15°, 22.5°, 45°, 90° | 2D, 3D | 150–1200 |
Tees #
| Material | DN (mm) | Notes |
|---|---|---|
| HDPE | 63–630 | Equal + one reducing per DN decade |
| PVC-U | 63–315 | Equal + one reducing per DN decade |
| DI | 80–1200 | Equal + reducing (e.g., 200×150, 300×200) |
| MSCL | 150–1200 | Equal + reducing |
Reducers (Concentric) #
| Material | DN Range | Notes |
|---|---|---|
| HDPE | ≤630 | Moulded or fabricated |
| PVC-U | ≤315 | Moulded |
| DI | ≤1200 | 80×80, 100×80, 125×100, 150×100, 200×150, 250×200,300×200, 350×250, 400×300, 450×350,500×400, 600×400, 700×500, 800×600, 900×700, 1000×800, 1200×1000 |
| MSCL | ≤1200 | Match pipe DN bands; eccentric near pumps if needed |
Couplings & Adaptors #
| Type | DN (mm) | PN | Notes |
|---|---|---|---|
| Universal coupling | 100–600 | 16 | For DI/MSCL transitions |
| Flange adaptor | All | 16 | Raised Face (RF) |
| Blank flange / End cap | All | 16 | Match pipe DN list |
Appurtenances (Valves & Hydrants) #
Valves #
| Type | DN (mm) | PN | End | Typical Use |
|---|---|---|---|---|
| Gate | 80–1200 | 16 | Flanged | Main isolation |
| Butterfly | 300–1200 | 16 | Flanged | Trunk main isolation |
| Check | 80–600 | 16 | Flanged | Backflow control |
| Air Valve | 80–150 | 16 | Flanged/thread | Air release at high points |
| Globe / Control | 80–200 | 16 | Flanged | Flow regulation |
Hydrants #
| Type | DN (mm) | PN | Variant |
|---|---|---|---|
| Above-ground | 100 | 16 | BOMBA standard |
| Underground | 100 | 16 | For confined areas |
Summary #
This list consolidates all practical Malaysian pipe, fitting, and appurtenance sizes into one ready-to-use reference. It’s meant for designers, catalog builders, and engineers who need accuracy without chasing scattered data tables.
All values reflect MS ISO 2531 / EN 545, MS EN 12201, MS 628, and MS 1965 practice — the real standards that govern Malaysia’s water infrastructure.
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