How do you size a steam pipe?
Two principal factors determine pipe sizing in a steam system: 1. The initial pressure at the boiler and the allowable pres- sure drop of the total system. The total pressure drop in the system should not exceed 20% of the total maximum pressure at the boiler. This includes all drops—line loss, elbows, valves, etc.
What schedule is steam pipe?
For nominal pipe size NPS 6 and smaller, Schedule 40 (sometimes called ‘standard weight’) is the lightest that would be specified for steam applications. Only Schedules 40 and 80 cover the full range from NPS 1/2 up to NPS 24 and are the most commonly used schedule for steam pipe installations.
How do you size a boiler pipe?
Boiler Piping Flow Pipe Sizing – Flow Rate Calculation To achieve a calculated flow rate when sizing the pump use the following formula: Take the measurement of the longest run in the loop in feet and add 50% to that measurement. Multiply that number by . 04 to get the pump head.
What is maximum velocity of steam in pipe?
25 to 40 m/s
As a general rule, a velocity of 25 to 40 m/s is used when saturated steam is the medium. 40 m/s should be considered a practical limit, as above this, noise and erosion will take place particularly if the steam is wet. Some National standards quote velocities up to 76 m/s for saturated steam.
How many pipes of a smaller size equal the carrying capacity of a larger pipe size?
The figures opposite the intersection of any two sizes is the number of the smaller-sized pipes required to equal the carrying capacity of one of the larger; thus one 4″ pipe equals 5.7- 2″ pipes.
How do I calculate chilled water pipe size?
When it comes to sizing for the chilled water pipe header, we simply add all the associated air conditioner chilled water flow rates and use the chart again to find the corresponded pipe size.
How many Btus can a 1/2 pipe deliver?
Steel Pipe – Schedule 40
| Capacity of Pipe (MBH ≈ CFH) | ||
|---|---|---|
| Pipe Size (in) | Pipe Length (ft) | |
| 1/2 | 0.622 | 31 |
| 3/4 | 0.824 | 70 |
| 1 | 1.049 | 141 |
How do you calculate carrying capacity of a pipe?
Calculation for Pipes Carrying Water
- Determine the two pipe diameters to be compared. Call them D1 and D2.
- Divide D2 by D1. This provides the ratio of the diameters of the two pipes.
- Raise the result to the power of 2.5. This result is the relative carrying capacity of two pipes carrying water.
What factors determine the size of a steam pipe?
Pipe Sizing Two principal factors determine pipe sizing in a steam system: 1. The initial pressure at the boiler and the allowable pressure drop of the total system. The total pressure drop in the system should not exceed 20% of the total maximum pressure at the boiler.
What is the difference between steam branch and trap discharge lines?
Steam branch lines take steam from steam main to steam-heated unit. Trap discharge lines move condensate and flash steam from the trap to a return line. Condensate return lines receive conden- sate from many trap discharge lines and carry the condensate back to the boiler room.
What is the PSI of a natural gas pipe?
range of 7 to 11 inches Water Column, or about 1/4 psi. The capacity of a 100 ft natural gas pipe with a nominal diameter 0.5 inches (actual ID 0.622 in ) Specific gravity of natural gas is set to 0.60.