Superior know how

Blast Hose ROI Made Simple

SIMPLE WAY TO DETERMINE IF YOU’RE BLAST HOSE IS THE CORRECT SIZE

If you’re familiar with our Primed Insights – or BlastOne consulting in general – you’ll know we are huge proponents of blasting with a minimum of 100psi at the nozzle! Visiting jobsites, it’s normal to find actual pressures much lower. Recently we visited a ship yard that had 8 operators working at 35psi! They simply didn’t know.

Part of the issues was they were using the wrong sized whip hoses. They were too small for the nozzles being used.

SIMPLE RULE OF THUMB FOR SIZING BLAST HOSE

Blast hose = minimum ID of 3x the nozzle orifice size, maximum of 5X
Air (Bull) hose = minimum ID of 4x the nozzle orifice size (no maximum)

Here’s a very useful chart taken from our catalog giving standard sizing for various nozzles and hose based on pressure.

You can easily test your pressure by using a BlastOne Nozzle Pressure Test Kit. Anything below 100 PSI coming out of the nozzle is going to cost you profits.

Should you have any jobsite issues involving pressure or inefficiencies – contact your BlastOne Rep and let us help you fix things.

Contact BlastOne with your Questions!

Abrasive Blasting Technical Data

Air Consumption (CFM) per Blast Nozzle Using Garnet Abrasive
Nozzle Size		Nozzle Pressure
Nozzle Size		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	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	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

We want to know what questions, challenges, and problems you’re facing – either with blasting or painting – that we may be able to solve.

If you find our insights helpful, please subscribe and share our channel.

Superior know how

Categories

Blast Hose ROI Made Simple

Abrasive Blasting Technical Data

Read More Posts

Wet-Blasting Equipment : A Comparison for Industrial Coatings Contractors

Comparing Different Types of Blast Nozzles

Maximize Your 2024 Growth

Troubleshooting A Runaway Blast Pot

Categories

BlasterAlls. Try’em, Love’em,

or Send’em Back for FREE!

PROFESSIONAL BLASTERS REQUIRE PROFESSIONAL GEAR. CLICK TO GET THE NEW

BLASTER PPE BUNDLE WITH NOVA 3 HELMET AT A DISCOUNTED RATE!

Superior know how

Categories

Blast Hose ROI Made Simple

Abrasive Blasting Technical Data

Related Content

Read More Posts

Wet-Blasting Equipment : A Comparison for Industrial Coatings Contractors

Comparing Different Types of Blast Nozzles

Maximize Your 2024 Growth

Troubleshooting A Runaway Blast Pot

Categories

LINK TO THIS PAGE OR SHARE!

Send the request