Please enable scripts and reload this page. Pipe sizing is a crucial aspect of steam system design. This tutorial offers detailed advice on standards, schedules, materials and sizing saturated steam table pdf various saturated and superheated steam duties.

These schedule numbers bear a relation to the pressure rating of the piping. There are eleven Schedules ranging from the lowest at 5 through 10, 20, 30, 40, 60, 80, 100, 120, 140 to schedule No. As the schedule number increases, the wall thickness increases, and the actual bore is reduced. A 100 mm Schedule 40 pipe has an outside diameter of 114.

30 mm, a wall thickness of 6. 02 mm, giving a bore of 102. A 100 mm Schedule 80 pipe has an outside diameter of 114. 30 mm, a wall thickness of 8. 56 mm, giving a bore of 97.

Only Schedules 40 and 80 cover the full range from 15 mm up to 600 mm nominal sizes and are the most commonly used schedule for steam pipe installations. This Module considers Schedule 40 pipework as covered in BS 1600. Tables of schedule numbers can be obtained from BS 1600 which are used as a reference for the nominal pipe size and wall thickness in millimetres. 1 compares the actual bore sizes of different sized pipes, for different schedule numbers. In mainland Europe, pipe is manufactured to DIN standards, and DIN 2448 pipe is included in Table 10.

Red Band, being heavy grade, is commonly used for steam pipe applications. Blue Band, being medium grade, is commonly used for air distribution systems, although it is sometimes used for low-pressure steam systems. The coloured bands are 50 mm wide, and their positions on the pipe denote its length. Pipes less than 4 metres in length only have a coloured band at one end, while pipes of 4 to 7 metres in length have a coloured band at either end. Pipe material Pipes for steam systems are commonly manufactured from carbon steel to ASME B 16. The same material may be used for condensate lines, although copper tubing is preferred in some industries.