Technical data

2.11.3.1 Pressure shall be within the range of 40 to 60 PSI

at the blast nozzle for 3.0 MOH hardness media (Type I), 25

to 40 PSI at the nozzle for 3.5 MOH hardness media (Type

V), and 20 to 30 PSI at the nozzle for 3.5 MOH hardness

media (Type II). See Paragraph 2.11.1 for recommended

parameters for stripping AGE and vehicles.

2.11.3.2 The blast nozzle tip to work surface standoff

distance shall be within the range of 12 to 24 inches for 3.0

MOH hardness media (Type I), 12 to 24 inches for 3.5 MOH

hardness media (Type V), and 18 to 30 inches for 3.5 MOH

hardness media (Type II). See Paragraph 2.11.1 for recom-

mended parameters for SE and vehicles.

2.11.3.3 The angle of incidence between the blast nozzle

and the work surface shall be within the range of 30 to 90

degrees for 3.0 MOH hardness media (Type I), 30 to 90

degrees for 3.5 MOH hardness media (Type V), and 0 to 60

degrees for 3.5 MOH hardness media (Type II). SE and

vehicles may be stripped at any angle.

2.11.4 Usage Restrictions. PMB shall not be used on

metal structures having a thickness less than 0.016 inch for

3.0 MOH and 3.5 MOH hardness media (Type I and V) and

0.032 inch for 3.5 MOH hardness media. See Paragraph

2.11.1 for portions pertaining to SE and vehicles.

NOTE

When blasting close to masking on the work

surface, the nozzle shall be held as close as

possible to 90 degrees with the work surface to

prevent undercutting of the masking materials.

2.11.5 Operational Parameters for Non-Metallic

(Composite) Surfaces. All PMB operations on non-

metallic surfaces (ﬁberglass, kevlar/epoxy, graphite/epoxy,

boron/epoxy, etc.) shall conform to the following parameters:

2.11.5.1 Pressure shall be within the range of 30 to 60 PSI

at the blast nozzle for the 3.0 MOH hardness media (Type I)

and 25 to 40 PSI for the 3.5 MOH hardness media (Type II

and V).

2.11.5.2 The blast nozzle tip to work surface standoff

distance shall be within the range of 12 to 24 inches.

2.11.5.3 The angle of incidence between the blast nozzle

and the work surface shall be within the range of 40 to 60

degrees.

TO 1-1-8

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