Power plant power pipeline chart
Power plant power pipeline chart
The steel pipe for electric power is open at both ends and has a hollow section. According to the production method, it can be divided into a seamless steel pipe and a welded steel pipe. The specifications of the steel pipe are expressed by the outer dimensions (such as the outer diameter or the side length) and the wall thickness, and the size thereof is wide. From small diameter capillaries to large diameter pipes up to several meters in diameter.
Power plant power pipeline grade chart
| Pipeline grade chart | ||||||
| Scope of application |
Power plant power pipeline (except main steam, main feed water, industrial extraction steam, circulating water, gas pipeline, other low pressure steam and water pipelines) |
Grade code: | ||||
| Nominal pressure PN (MPa) | 1.6 | Operating medium | ||||
| Design conditions | Design pressure (MPa) | 1.0 | Basic material | Carbon steel | ||
| Design temperature (°C) | ≤200 | Corrosion margin (mm) | 1.5 | |||
| Item | Nominal diameter DN (mm) | Specification | Material | Standard | ||
| Pipe | 15 | Seamless steel pipe Φ18×2 | 20 | GB3087-2008 | ||
| 20 | Seamless steel pipe Φ25×3 | |||||
| 25 | Seamless steel pipe Φ32×3 | |||||
| 32 | Seamless steel pipe Φ38×3 | |||||
| 40 | Seamless steel pipe Φ45×3 | |||||
| 50 | Seamless steel pipe Φ57×3.5 | |||||
| 65 | Seamless steel pipe Φ76×3.5 | |||||
| 80 | Seamless steel pipe Φ89×4 | |||||
| 100 | Seamless steel pipe Φ108×4 | |||||
| 125 | Seamless steel pipe Φ133×4 | |||||
| 150 | Seamless steel pipe Φ159×4.5 | |||||
| 200 | Seamless steel pipe Φ219×6 | |||||
| 250 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ273×6 |
Q235-B | SY/T5037-2000 | |||
| 300 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ325×7 |
|||||
| 350 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ377×7 |
|||||
| 400 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ426×7 |
|||||
| 450 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ480×7 |
|||||
| 500 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ529×8 |
|||||
| 600 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ630×9 |
|||||
| 700 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ720×11 |
|||||
| 800 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ820×12 |
|||||
| 900 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ920×13 |
|||||
| 1000 |
Spiral submerged arc welded steel pipe for low pressure fluid transportation Φ1020×14 |
|||||
| Pipe fittings | elbow |
Seamless hot-bending elbow (with straight or no straight section) outer diameter and wall thickness are the same as the pipe type specification, such as: seamless hot-bending elbow (with straight section) Φ159×4.5 |
20 | 2000GD | ||
| Tee |
When the design pressure is ≥ 2.0 MPa, the temperature is ≥ 250 ° C, and the ratio of the branch pipe to the nominal diameter of the main pipe is greater than or equal to 0.8, a three-way connection is used. The remaining pipes are welded to the main pipe. |
|||||
| concentric reducer |
Steel plate welded reducer (concentric or eccentric) The outer diameter and wall thickness are the same as the pipe type specification, such as: steel plate welded reducer Φ159×4.5/Φ108×4 |
20 | 2000GD | |||
| Valve | Gate valve | 15~40 | Z11H-16C | Carbon steel | ||
| 15~400 | Z41H-16C | Carbon steel | ||||
| Shut-off valve | 15~40 | J11H-16C | Carbon steel | |||
| 15~200 | J41H-16C | Carbon steel | ||||
| Butterfly valve | 40~600 | D343H-16C | Carbon steel | |||
| Ball valve | 15~50 | Q11H-16C | Carbon steel | |||
| Check valve | 15~40 | H41H-16C (Horizontal lift） | Carbon steel | |||
| H42H-16C（Vertical lift） | Carbon steel | |||||
| 50~600 | H44H-16C（Swing） | Carbon steel | ||||
| Flange |
Flange flat welding flange F1.6C12RS Model specification, such as: flat surface welding flange PN1.6MPa DN150 (Series II) |
20 | 2000GD | |||
| Double headed stud | 35 | GB/T 9125-2003 | ||||
| Large hex nut | 35 | GB/T 9125-2003 | ||||
| Light washer | Q235-B | GB/T 95-2002 | ||||
| Gasket |
Flexible graphite metal wound gasket (with inner ring and positioning ring type) Model specification, such as: PN1.6MPa DN150 D 1222 type |
0Cr18Ni9/Flexible graphite | GB/T 4622.2-2003 | |||
