The Following is DIRECT from Osha in
regards to “Compliancy Regulations”.
U.S. Department of Labor
Occupational Safety & Health Administration
OSHA Instruction STD 01-13-001 – STD 1-13.1 October 30, 1978 – Reduction
of Air Pressure below 30 psi for Cleaning Purposes
February 14, 1972
OSHA PROGRAM DIRECTIVE #100-1
To: National and Field Offices
SUBJECT: Reduction of Air Pressure Below 30 psi for Cleaning Purposes
Attachment: Acceptable Methods for Complying with 41 CFR 50-204.8
and 29 CFR 1910.242(b)
- Purpose. To provide guidance and examples of what alternate
systems will meet the requirements of this section, and to
clarify its intent.
- Background. A number of inquiries have been received requesting
a clarification of the meaning of 1910.242(b) also known as 41
CFR 50-2048 under the Walsh-Healey Act.
- Interpretation. The phrase “reduce to less than 30 psi” means that
the downstream pressure of the air at the nozzle (nozzle pressure)
or opening of a gun, pipe, cleaning lance, etc., used for cleaning
purposes will remain at a pressure level below 30 psi for all static
conditions. The requirements for dynamic flow are such that in the case
when dead ending occurs a static pressure at the main orifice shall not
exceed 30 psi. This requirement is necessary in order to prevent a back
pressure buildup in case the nozzle is obstructed or dead ended. See
enclosure (1) for two acceptable methods of meeting this requirement.
Also, there is no intent to restrict the diameter of the nozzle orifice or the
volume (CFM) flowing from it. “Effective chip guarding” means any method or equipment which will prevent a
chip or particle (of whatever size) from being blown into the eyes or unbroken
skin of the operator or other workers. Effective chip guarding may be separate
from the air nozzle as in the case where screens or barriers are used. The use
of protective cone air nozzles are acceptable in general for protection of the
operator but barriers, baffles or screens may be required to protect other workers
if they are exposed to flying chips or particles.
- Action. Inquiries about subject section should be handled in accordance
with this instruction.
- Effective Date. This instruction is effective immediately, and will remain
in effect until canceled or superseded.
Director, of Program Operations
DISTRIBUTION: National Office Field
A/SEC. (3) Regional Administrators (6) Dep. A/Sec (2) Area/District Offices (3) Spec. Asst.
(1) Training Institute (1) Directors (3) RAO (2) SOL (1) Professional Staff (1) BLS (1)
Review Commission (6)
For Attachment see Printed Copy Acceptable Methods For Complying With 41 CFR
50-204.8 and 29 CFR 1910.242(b) Use of Compressed Air
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