The cleaning air must be reduced to less than 30 p.s.i. before the hose is aimed, according to Legal Information Institute.
What pressure the air hose may use for cleaning
The federal rule for power-operated hand tools states that compressed air shall not be used for cleaning purposes except where reduced to less than 30 p.s.i., according to Legal Information Institute. This limit applies specifically to cleaning tasks where the air hose is directed at work surfaces to remove chips or debris. The rule does not allow the use of full compressor pressure for this purpose. Instead, the air pressure must be lowered to a level below 30 p.s.i. before the nozzle is aimed at the work area.
Two additional conditions must be met simultaneously with the pressure reduction. First, effective chip guarding must be in place. This means the setup must contain the chips and debris so they do not fly into the eyes or face of the worker or nearby personnel. Second, personal protective equipment that meets the requirements of subpart E of the same regulation must be worn. The source explicitly ties the permission to use compressed air for cleaning to both the pressure limit and the presence of these protective measures, according to Legal Information Institute.
Key takeaways for cleaning air pressure before chips are blown on a jobsite
- Set the cleaning air pressure below 30 p.s.i. before aiming the hose, as required for cleaning purposes in 29 CFR § 1926.302 according to Legal Information Institute.
- Use effective chip guarding and personal protective equipment meeting subpart E requirements when using compressed air for cleaning according to Legal Information Institute.
- Do not use compressed air above 10 p.s.i. gauge to blow dirt, chips, or dust from clothing while it is being worn, according to California Department of Industrial Relations.
- Note that the 30 p.s.i. requirement does not apply for concrete form, mill scale and similar cleaning purposes according to Legal Information Institute.
The cleaning pressure each page prints
The federal page for 29 CFR § 1926.302 states that compressed air shall not be used for cleaning purposes except where reduced to less than 30 p.s.i. and then only with effective chip guarding and personal protective equipment which meets the requirements of subpart E of this part, according to Legal Information Institute. This sentence sets the pressure line and the equipment conditions before the hose is aimed. The Washington State Legislature page for WAC 296-155-360 states that you must not use compressed air at the nozzle for cleaning purposes except where reduced to less than 30 p.s.i. and then only with effective chip guarding and personal protective equipment which meets the requirements of Part C of this chapter, according to Washington State Legislature. Both pages print the same 30 p.s.i. limit for cleaning. The federal page ties the personal protective equipment to subpart E of the part, while the Washington page ties it to Part C of the chapter. The chip guarding requirement appears in both sentences as a condition for using the air.
Write the pressure line you see on the page before you set the regulator. If the page says "less than 30 p.s.i.," that is the number you record. Do not assume the number is the same on every page or for every use of compressed air. The cleaning sentence is specific to cleaning purposes. Other uses of compressed air may have different lines on other pages. The clothing rule and the form-cleaning rule are separate from this cleaning sentence. The 30 p.s.i. limit here applies to the nozzle when cleaning. It does not apply to the clothing line or to the concrete form exception.
When a page allows a higher pressure for concrete forms
Some cleaning jobs are not bound by the 30 p.s.i. limit printed on the general cleaning sentence. The federal page states that the 30 p.s.i. requirement does not apply for concrete form, mill scale and similar cleaning purposes, according to Legal Information Institute. The exception applies to concrete form, mill scale and similar cleaning purposes. The page does not provide a new pressure number for these tasks; it simply removes the 30 p.s.i. cap for that specific scope.
The Washington State Legislature page adds a specific condition for when higher pressure is permitted in these form-cleaning scenarios. It states that concrete form, mill scale, and similar cleaning may be performed with air pressure exceeding 30 p.s.i. provided the nozzle and/or cleaning pipe is at least 3 feet long with a quick-closing (deadman) valve between the hose and the nozzle or pipe, according to Washington State Legislature. For this exception, the nozzle and/or cleaning pipe must be at least 3 feet long. A quick-closing (deadman) valve must be between the hose and the nozzle or pipe.
The federal page and the Washington page handle this exception differently. The federal text from the Legal Information Institute identifies the scope of the exception but does not list the nozzle length or valve requirement in the same sentence. The Washington page from the Washington State Legislature combines the scope with the specific hardware requirements for the nozzle and pipe. If you are using a nozzle that is shorter than 3 feet or lacks a quick-closing valve, the Washington page does not support using pressure above 30 p.s.i. for these tasks. The federal page’s exception applies to the task type, while the Washington page’s exception applies to the task type only when the specific hardware conditions are met.
A filled reference table of the air-hose lines
The table below lists the specific air-hose lines printed by each publisher.
| publisher | cleaning pressure it prints | clothing or form exception it prints | any hose or nozzle line it prints |
|---|---|---|---|
| Legal Information Institute | less than 30 p.s.i. for cleaning purposes | The 30 p.s.i. requirement does not apply for concrete form, mill scale and similar cleaning purposes | The manufacturer's safe operating pressure for hoses, pipes, valves, filters, and other fittings shall not be exceeded |
| Washington State Legislature | less than 30 p.s.i. at the nozzle for cleaning purposes | Concrete form, mill scale, and similar cleaning may be performed with air pressure exceeding 30 p.s.i. provided the nozzle and/or cleaning pipe is at least 3 feet long with a quick-closing (deadman) valve between the hose and the nozzle or pipe | Pneumatic power tools and hose sections must be secured by threaded couplings, quick disconnect couplings or by 100 pound tensile strength safety chain or equivalent across each connection |
| California Department of Industrial Relations | Clothing cleaning: no more than 10 p.s.i. gauge | Compressed air or other compressed gases above 10 p.s.i. gauge shall not be used to blow dirt, chips, or dust from clothing while it is being worn | Abrasive blast cleaning nozzles shall be equipped with an operating valve which must be held open manually |
The Legal Information Institute page prints the 30 p.s.i. cleaning limit and the concrete form exception, according to Legal Information Institute. The Washington State Legislature page prints the 30 p.s.i. nozzle limit and the 3-foot nozzle condition for form cleaning, according to Washington State Legislature. The California Department of Industrial Relations page prints the 10 p.s.i. clothing limit and the blast nozzle valve requirement, according to California Department of Industrial Relations. The GovRegs page prints the hose connection security requirement, according to GovRegs.
Hose clips, nailer muzzles, and blast nozzles on the same pages
The pages that set the cleaning pressure also specify how the hose, the tool muzzle, and the blast nozzle must be secured before air is released. These requirements appear alongside the pressure limits on the same regulatory documents, meaning the contractor must verify the physical connections and safety devices before the hose is aimed.
Hose connection security Federal regulations require that pneumatic power tools be secured to the hose or whip by some positive means to prevent the tool from becoming accidentally disconnected, according to GovRegs. Washington State Legislature regulations specify that pneumatic power tools and hose sections must be secured by threaded couplings, quick disconnect couplings, or by 100 pound tensile strength safety chain or equivalent across each connection to prevent the tool or hose connections from becoming accidentally disconnected, according to Washington State Legislature.
Pressure limits for fittings The same federal page notes that the manufacturer's safe operating pressure for hoses, pipes, valves, filters, and other fittings shall not be exceeded, according to Legal Information Institute. Washington State Legislature regulations state that you must not exceed the manufacturer's safe operating pressure for hoses, pipes, valves, filters, and other fittings, according to Washington State Legislature. This limit covers hoses, pipes, valves, filters and other fittings.
Nailer muzzle safety For tools that drive fasteners, the federal page requires that all pneumatically driven nailers, staplers, and other similar equipment provided with automatic fastener feed, which operate at more than 100 p.s.i. pressure at the tool shall have a safety device on the muzzle to prevent the tool from ejecting fasteners, unless the muzzle is in contact with the work surface, according to Legal Information Institute. A separate rule requires safety clips or retainers to be securely installed and maintained on pneumatic impact tools to prevent attachments from being accidentally expelled, according to GovRegs.
Logging today's air-hose check
Before the hose is aimed, write the nozzle job, the pressure you will use, and which page you followed. The federal rule states that compressed air shall not be used for cleaning purposes except where reduced to less than 30 p.s.i., and then only with effective chip guarding and personal protective equipment which meets the requirements of subpart E of this part, according to Legal Information Institute. Record the specific nozzle job, such as clearing chips from a concrete form or a steel beam, in the daily log's task field. In the daily log's pressure field, write the exact pressure setting you have verified on the regulator before the air flows. In the daily log's source field, note the source page you are following for that specific cleaning task. This written record ensures the pressure is set before the hose is aimed at the work. Keep the clothing rule separate from the chip-cleaning rule in your notes. If you are using the air for a different purpose, such as blowing dust off clothing, do not use the 30 psi cleaning line for that task. The 30 psi limit applies specifically to cleaning purposes as defined by the rule. Write down the date and the name of the person setting the pressure. This creates a clear trail for your daily log. If you are unsure which page applies to your specific nozzle job, stop and check the source before aiming the hose. The goal is to have a written confirmation that the pressure is below the limit and that the correct page was consulted. Do not rely on memory for the pressure setting. Write it down. This simple step helps you stay compliant and keeps the record clear for review. If you need to track other daily checks, see the Construction Daily Log Checklist for Supervisors.
Related guides
FAQ about cleaning with compressed air
Cleaning below 30 p.s.i. with chip guarding and protective equipment
The Washington State Legislature page also addresses concrete form cleaning, noting that air pressure exceeding 30 p.s.i. is allowed for such tasks if specific nozzle conditions are met, according to Washington State Legislature.
What does the clothing sentence allow?
California's clothing rule prohibits using compressed air or other compressed gases above 10 p.s.i. gauge to blow dirt, chips, or dust from clothing while it is being worn, according to California Department of Industrial Relations. This 10 p.s.i. line is separate from the 30 p.s.i. cleaning limit found on the federal page, and the two rules apply to different tasks.
When does a form-cleaning extra appear?
The exception for concrete form, mill scale, and similar cleaning appears when the nozzle and/or cleaning pipe is at least 3 feet long with a quick-closing (deadman) valve between the hose and the nozzle or pipe, according to Washington State Legislature. This condition allows air pressure exceeding 30 p.s.i. for those specific cleaning purposes, whereas the federal page notes that the 30 p.s.i. requirement does not apply for concrete form, mill scale and similar cleaning purposes, according to Legal Information Institute.
Record task, pressure setting, source page, date and pressure setter
This record helps you match the specific task to the correct pressure limit and nozzle requirement. Keep the clothing rule separate from the chip-cleaning rule in your notes, as they apply to different activities.