Welding Safety and Hot Work – 701.34

Back to Facilities

University of Arkansas at Little Rock
Policy Name: Welding Safety and Hot Work
Policy Number: 701.34
Effective Date: July 3, 2008

Policy:

All employees, students, volunteers, and contractors working under UALR supervision shall comply with the elements of the UALR Hot Work Safety Program (see Procedures Section).

Objective:

To establish minimum requirements for performing hot work during maintenance and construction activities.

Authority:

OSHA 29CFR 1910.252-254 Governors Executive Order 2000-292 NFPA51B.

Responsibilities:

Environmental Health and Safety (EH&S)

Develop, maintain, distribute, and provide oversight in accordance with all applicable federal and state regulations, and best industry practices. EH&S staff, supervisors and Pi’s have the responsibility and authority to halt any unsafe practices not in accordance with this policy. EH&S has the responsibility for assisting departments in developing appropriate hot work safety plans, providing technical guidance and assisting with employee training.

Departments

Comply with all policy and program elements.

Procedures:

Any work involving burning, welding, torch cutting, grinding where sparks are produced, soldering, or brazing in construction, maintenance and fabrication activities shall follow the UALR Hot Work Safety Program.

Specific Responsibilities:

Competent Hot Work Supervisor (CHWS)

The CHWS is responsible for the safe operations of hot work activity under their supervision. These duties include:

  • Establish permissible areas for hot work.
  • Ensure that only approved apparatus, such as torches, manifolds, regulators and pressure reducing valves, are used.
  • Ensure that all individuals involved in the hot work operations are familiar with UALR Hot Work requirements.
  • Ensure that all individuals involved in the hot work operations are trained in the safe operation of their equipment and the safe use of the process. These individuals must have an awareness of the risks involved and understand the emergency procedures in the event of a fire.
  • Determine site-specific flammable materials, hazardous processes or other potential fire hazards present or likely to be present in the work location.
  • Ensure combustibles are protected from ignition by the following means:
    • Move the work to a location free from combustibles.
    • If the work cannot be moved, ensure the combustibles are moved to a safe distance, or have the combustibles properly shielded against ignition.
    • Ensure hot work is scheduled such that operations that could expose flammables or combustibles to ignition do not occur during hot work operations.
    • If any of these conditions cannot be met, then hot work must not be performed.
    • Determine that fire protection and extinguishing equipment are properly located and readily available.
    • Ensure sufficient local exhaust ventilation is provided to prevent accumulation of any smoke and fume.
  • Ensure that a fire watch is posted at the site when:
    • Hot work is performed in a location where other than a minor fire might develop or where the following conditions exist.
    • Combustible materials in building construction or contents are closer than 35 ft to the point of hot work.
    • Combustible materials are more than 35 ft away but are easily ignited by
      sparks.
    • Wall or floor openings are within 35 feet and expose combustible materials in adjacent areas. This includes combustible materials concealed in walls or floors.
    • Combustible materials are adjacent to the opposite side of partitions, walls,
      ceilings, or roofs and are likely to be ignited.

Where a fire watch is not required, the CHWS shall make a final inspection 1/2 hour after the completion of hot work operations to detect and extinguish possible smoldering fires.

UALR Hot Work Safety Program Scope and Application:

This program is designed to prevent injury and loss of property from fire or explosion as a result of hot work in all UALR spaces and activities.

It covers: welding, brazing, soldering, heat treating, grinding, powder-actuated tools, hot riveting and all other similar applications producing a spark, flame or heat.

This program does not cover use of: candles, laboratory activities, pyrotechnics or special effects, cooking equipment, electric soldering irons or torch-applied roofing (See NFPA 241).

All hot work performed by outside contractors shall be in conformance with UALR policies and procedures.

Hot work operations in confined spaces require additional safeguards and are addressed in the UALR Confined Spaces Policy (UALREH&S-SAFE-3/30/2001).

Hot work on and near building systems and piping may require additional safeguards and are addressed in EH&S Control of Hazardous Energy – Lockout/Tagout Policy UALREHS-SAFE1-01/04/2002.

Definitions:

Competent Hot Work Supervisor (CHWS): For UALR employees the CHWS shall have successfully completed competent person training and examination to be considered competent. For outside contractors, the hot work supervisor shall be identified and the name provided to the project manager. The CHWS cannot be the hot work operator. Failure to properly adhere to UALR Hot Work Procedures shall result in suspension of competent person authority and possible disciplinary action.

Designated Area: Permanent location designed for or approved by a CHWS for hot work operations to be performed regularly.

Hot Work: Any work involving welding, brazing, soldering, heat treating, grinding, powder-actuated tools, hot riveting and all other similar applications producing a spark, flame or heat, or similar operations that are capable of initiating fires or explosions.

Hot Work Permit: A document issued by the CHWS for the purpose of authorizing a specified activity.

Hot Work Operator: An individual designated by UALR to perform hot work under the authorization of a CHWS.

Welding and Allied Processes: Those processes such as arc welding, oxy-fuel gas welding, open-flame soldering, brazing, thermal spraying, oxygen cutting and arc cutting.

Hot Work Operator (HWO): The hot work operator shall handle the equipment safely and perform work so as not to endanger lives and property. Specific duties include the following:

  • No hot work shall be conducted without specific written authorization from the CHWS via
    completion of the Hot Work Permit.
  • The operator must cease hot work operations if unsafe conditions develop.
  • The operator must notify the CHWS for reassessment of the situation in the event of suspected unsafe conditions or concerns expressed by affected persons.

Fire Watch: The fire watch is an individual posted in specific circumstances as described above. The function of the fire watch is to observe the hot work and monitor conditions to ensure that a fire or explosion does not occur as a result of the work performed. The fire watch is authorized to stop any unsafe operation or activity. Specific duties and responsibilities include:

    • Watch for fires, smoldering material or other signs of combustion.
    • Be aware of the inherent hazards of the work site and of the hot work.
    • Ensure that safe conditions are maintained during hot work operations, and stop the hot work operations if unsafe conditions develop.

Have fire-extinguishing equipment readily available and be trained in its use.

    • Extinguish fires when the fires are obviously within the capacity of the equipment available. If the fire is beyond the capacity of the equipment, sound the alarm immediately.
    • Be familiar with the facilities and procedures for sounding an alarm in the event of a fire.
    • A fire watch shall be maintained for at least V2 hour after completion of hot work operations in order to detect and extinguish smoldering fires.
    • More than one fire watch shall be required if combustible materials that could be ignited by the hot work operation cannot be directly observed by a single fire watch (e.g. in adjacent rooms where hot work is done on a common wall).
Hot Work Operational Requirements:

Hot work is allowed only in areas that are or have been made fire-safe. Hot work may only be performed in either designated areas or permit-required areas.

A designated area is a specific area designed or approved for such work, such as a maintenance shop or a detached outside location that is of noncombustible or fire-resistive construction, essentially free of combustible and flammable contents, and suitably segregated from adjacent areas.

A permit-required area is an area made fire-safe by removing or protecting combustibles from ignition sources.

Hot work is not allowed:
• In sprinklered buildings if the fire protection system is impaired
• In the presence of explosive atmospheres or potentially explosive atmospheres ( e.g. on
drums previously containing solvents)
• In explosive atmospheres that can develop in areas with an accumulation of combustible
dusts (e.g. grain silos).
Hot Work Permit
Before hot work operations begin in a non-designated location, a completed hot work permit prepared by the CHWS is required. (See Appendix I). Based on local conditions, the CHWS must determine the length of the period, not to exceed 24 hours, for which the hot work permit is valid.
The following conditions must be confirmed by the CHWS before permitting the hot work to commence:
• Equipment to be used (e.g. welding equipment, shields, personal protective equipment,
fire extinguishers) must be in satisfactory operating condition and in good repair.
• The floor must be swept clean for a radius of 35 ft if combustible materials, such as
paper or wood shavings are on the floor.
• Combustible floors (except wood on concrete) must be• kept wet or be covered with damp sand ( note: where floors have been wet down
personnel operating arc welding or cutting equipment shall be protected from
possible shock)., or
• be protected by noncombustible or fire-retardant shields.

• All combustible materials must be moved at least 35 ft away from the hot work operation.
If relocation is impractical, combustibles must be protected with fire-retardant covers,
shields or curtains. Edges of covers at the floor must be tight to prevent sparks from
going under them, including where several covers overlap when protecting a large pile.
• Openings or cracks in walls, floors, or ducts within 35 ft of the site must be tightly
covered with fire-retardant or noncombustible material to prevent the passage of sparks
to adjacent areas.
• If hot work is done near walls, partitions, ceilings, or roofs of combustible construction,
fire-retardant shields or guards must be provided to prevent ignition.
• If hot work is to be done on a wall, partition, ceiling or roof, precautions shall be taken to
prevent ignition of combustibles on the other side by relocating combustibles. If it is
impractical to relocate combustibles, a fire watch on the opposite side from the work
must be posted.
• Hot work must not be attempted on a partition, wall, ceiling or roof that has a
combustible covering or insulation or on walls or partitions of combustible sandwich-type
panel construction.
• Hot work that is performed on pipes or other metal that is in contact with combustible
walls, partitions, ceilings, roofs or other combustibles must not be undertaken if the work
is close enough to cause ignition by conduction.
• Fully charged and operable fire extinguishers that are appropriate for the type of
possible fire shall be available immediately at the work area. These extinguishers
should be supplied by the group performing the hot work. The fire extinguishers normally
located in a building are not considered to fulfill this requirement.
• If hot work is done in proximity to a sprinkler head, a wet rag shall be laid over the head
and then removed at the conclusion of the welding or cutting operation. During hot work,
special precautions shall be taken to avoid accidental operation of automatic fire
detection or suppression systems (for example, special extinguishing systems or
sprinklers).
• Nearby personnel must be suitably protected against heat, sparks, and slag.

Work Closeout:
• A fire watch shall be maintained for at least 30 minutes after completion of hot work
operations in order to detect and extinguish smoldering fires.
• The CHWS shall inspect the job site 30 minutes following completion of hot work and
close out the permit with the time and date of the final check.
• The completed hot work permit shall be retained for 6 months following completion of the
project.


Source: Environmental Health and Safety
Revised:
Approved By: Environmental Health and Safety Committee, July 3, 2008
Custodian: EHS Committee