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Is Your Blast Hose the Right Size? Ensure Optimal Pressure Every Time

Ensure Your Blast Hose is the Right Size for Maximum Efficiency

In the world of sandblasting, maintaining at least 100 PSI at the nozzle is crucial for efficient operations and profitability. However, during job site visits, we often find operators working with much lower pressures, which significantly impacts their performance. For instance, we recently encountered a shipyard where eight operators were blasting at just 35 PSI. The root cause? Incorrectly sized whip hoses that were too small for the nozzles in use.

Simple Rule of Thumb for Blast Hose Sizing

To avoid such inefficiencies, follow these straightforward guidelines:

  • Blast Hose = 3x Nozzle Size (internal diameters)
  • Air Hose = 4x Nozzle size (internal diameters)

Using the correct hose size ensures that you maintain optimal pressure at the nozzle, which is vital for effective blasting and overall job performance. You can easily check your pressure using a BlastOne Nozzle Pressure Test Kit. Remember, any pressure below 100 PSI at the nozzle is costing you time and money.

If you’re facing any pressure-related issues or inefficiencies on your job site, don’t hesitate to reach out to your BlastOne representative. We’re here to help you resolve any challenges and enhance your blasting operations.

Contact BlastOne with your Questions!

Abrasive Blasting Technical Data

Air Consumption (CFM) per Blast Nozzle Using Garnet Abrasive


Nozzle Size

Nozzle Pressure

50 psi

60 psi

70 psi

80 psi

90 psi

100 psi

110 psi

120 psi*

130 psi*

140 psi*

150 psi*

No. 2

⅛”

14

17

19

21

24

26

28

30

32

34

37

No. 3

³/₁₆

32

37

42

47

52

57

62

67

72

77

83

No. 4

1/4”

57

66

75

84

93

103

111

119

127

136

185

No. 5

/₁₆

89

103

117

131

145

158

172

186

200

214

229

No. 6

⅜”

129

149

169

189

209

229

249

269

289

309

330

No. 7

/₁₆

176

203

230

258

285

312

339

367

394

422

451

No. 8

1/2”

229

265

300

336

371

407

442

478

513

549

586

No. 10

⅝”

356

412

468

524

580

632

688

744

800

856

914

No. 12

¾”

516

596

676

756

836

916

996

1076

1156

1236

1318

EFFICIENCY

47%

55%

64%

74%

86%

100%

115%

130%

145%

165%

175%

* Ensure equipment is rated for these pressures.

Nozzle Pressure vs Efficiency

Blast Nozzle Pressure

Approximate Abrasive Velocity

Approximate Efficiency Factor

100 psi

675 kph (422 mph)

100%

95 psi

640 kph (400 mph)

93%

90 psi

585 kph (366 mph)

86%

85 psi

530 kph (331 mph)

80%

80 psi

495 kph (309 mph)

74%

75 psi

450 kph (281 mph)

69%

70 psi

420 kph (263 mph)

64%

Hose Selection Guide for Blasting at 100 psi Nozzle Pressure

Nozzle Number

No. 4

No. 5

No. 6

No. 7

No. 8

Nozzle Size

1/4” (6 mm)

5/16” (8 mm)

3/8” (10 mm)

7/16” (11 mm)

1/2” (13 mm)

CFM at 100 psi

103

158

229

312

407

Air Hose ID – minimum

25 mm (1”)

38 mm (1 1/2”)

38 mm (1 1/2”)

50 mm (2”)

50 mm (2”)

Blast Hose ID – minimum

20 mm (¾”)

25 mm (1”)

32 mm (1 1/4”)

32 mm (1 1/4”)

38 mm (1 1/2”)


Typical ID – OD Relationship in Common Blast Hose

Standard Hose

Supa/Whip Hose

ID

OD

ID

OD

mm

inch

mm

inch

mm

inch

mm

inch

13

1/2”

33

1 5/16”

13

1/2”

30

1 3/16”

19

¾”

40

1 1/2”

19

¾”

33

1 5/16”

25

1

48

1 ⅞”

25

1

40

1 1/2”

32

1 1/4”

55

1 5/32”

32

1 1/4”

48

1 ⅞”

38

1 1/2”

60

2 ⅜”

38

1 1/2”

55

2 5/32”

English USA Units/Metric Conversion Chart

1 3/6”

5 mm

1 1/4”

32 mm

1/4”

6 mm

5/6”

33 mm

5/16”

8 mm

1-1/2”

38 mm

3/8”

10 mm

1 9/16”

40 mm

7/16”

11 mm

1 3/4”

44 mm

1/2”

13 mm

1 7/8”

48 mm

5/8”

16 mm

2”

51 mm

3/4”

19 mm

2 5/32”

55 mm

1”

25 mm

2 3/8”

60 mm

1 3/16”

30 mm

2 1/2”

64 mm

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