Manufacturers Recommended Pressure Settings for Welding, Cutting and Heating for Oxygen and Acetylene

Oxygen and Acetylene Cutting

Plate Thickness

mm

Nozzle Size

Pressure kPa Cutting Speed mm/min

Consumption

Oxygen Acetylene Oxygen 1/MIN Acetylene 1/MIN

6 8 200 100 450 20 3.5

12 12 200 100 380 38 4

20 12 220 100 340 42 4.5

25 15 250 100 320 56 6

40 15 350 100 270 75 7

50 15 400 100 240 85 7.5

75 15 450 100 180 95 8

100 20 400 100 150 134 9

125 20 450 100 150 215 10

150 24 500 100 130 232 12.5

Tip SizeRegulator Pressue kPa Gas Consumption

Oxygen Acetylene Oxygen 1/MIN Acetylene 1/MIN

8 50 50 2 2

10 50 50 3 3

12 50 50 4 4

15 50 50 6.5 6.5

20 50 50 12 12

26 50 50 22 22

32 100 100 38 38

8x12HT 150 100 58 55

4x24HT 200 100 100 95

Weld and Heat

Please note: Withdrawal rates from acetylene cylinders are limited to about 1/7 of the cylinder contents per hour, e.g. From a “G” size cylinder of 7m³ capacity, the maximum recommended flow is 1m³/hr ( 17L/min). For applications that exceed this capacity, cylinders should be manifold connected – If in doubt refer to the gas supplier. AS 4839-2001 The safe use of portable and mobile oxy-fuel gas systems for welding, cutting, heating allied processes.

Manufacturers Recommended Pressure Settings for Welding, Cutting and Heating for Oxygen and LPG Cutting

Oxygen and LPG Cutting

Plate Thickness

mmNozzle Size

Pressure kPa Consumption

Oxygen LPG Oxygen 1/MIN LPG 1/MIN

6 8 200 100 30 3.5

12 12 200 100 50 4

20 12 220 100 58 4.5

25 15 250 100 73 5.5

40 15 350 100 90 5.5

50 15 400 100 99 5.5

75 15 450 100 111 6

100 20 400 100 149 6

125 20 450 100 171 6.5

150 24 500 100 256 9

Tip SizeRegulator Pressue kPa Gas Consumption

Oxygen LPG Oxygen L/MIN LPG L/MIN

18x12HT 550 100 200 50

36x12HT 700 100 300 75

48x12HT 700 140 400 100

Oxygen and LPG Heating

Please note: AS 4839-2001 The safe use portable mobile oxy-fuel gas systems for welding, cutting, heating and allied processes.