504 Hot Work Permit Rev 8

Document Number: HSP - 504 Current Rev: 1/25/2023
Revised By: Gregory Thorn Review Cycle: 3 years

Manager Approval MOC HSE-20-17 Revision No. 8
Revisions noted in italics Page 1 of 18
HEALTH ANDSAFETYPROCEDURE504–HotWork
1.0 PURPOSE
Westlake is committed to providing a safe and healthy work environment and protecting all
persons working in our facilities from uncontrolled hazards in the workplace. Management
recognizes the potential for fire from hot work activities. This document provides
requirements to manage the risk of ignition of flammable gases or vapors, and or
combustible material while performing hot work.
2.0 SCOPE
This procedure applies to all Westlake Chemical Geismar employees and contractors who
operate, conduct maintenance and/or provide services for the Geismar facility’s s
processes.
3.0 DEFINITIONS
3.1 Affected Employee - Employees impacted by the performance of permitted work

which may include hot work
3.2 Authorized employee – Referred to as Hot Work Permit Receiver - Employees

trained and authorized to perform permitted work in the plant.
3.3 Class 1 Hazardous Locations - Flammable gases or vapors are or may be

present in the air in quantities sufficient to produce explosive or ignitable mixtures.
3.3.1 Division I - Ignitable concentrations of flammable gases or vapors may exist

under normal operating conditions, exist frequently due to
repair, maintenance operations, leakage or be released as a
result of breakdown or faulty operation of equipment and
simultaneous failure of electrical equipment.
3.3.2 Division II - Locations where flammable gases and liquids are handled,
processed or used but will normally be protected by mechanical
ventilation or a closed system in which they can only escape in
the event of an accidental breakdown, rupture or abnormal
operation, locations adjacent to Division I areas where
flammable gases or vapors may occasionally exist unless
prevented by clean air ventilation and effective safeguards.
3.4 Class 2 Hazardous Locations- Combustible dust is or may be present
3.4.1 Division I - Locations were combustible dust is or may be suspended in the

air under normal conditions in quantities sufficient enough to
cause explosions or ignitable mixtures, where mechanical
failure or abnormal operation of machinery may produce such
explosions or ignitable mixtures or where combustible dust of an
Printed controlled copy expires 24 hours after 12:54 PM on 6/8/2021.
electrically conductive nature may be present.
3.4.2 Division II - Locations where combustible dust will not normally be

suspended in the air in quantities sufficient to produce
explosions or ignitable mixtures, dust accumulation will normally
be insufficient to interfere with the normal operation of electrical
equipment, combustible dust may be suspended in the air as a
result of infrequent malfunctioning or handling of process
equipment
3.5 Combustible Dust - particulate solid that will burn violently when suspended in air
over a range of concentrations, regardless of particle size or shape. Note: any
“material that will burn in air” in a solid form can be explosive when in a finely
divided form as a powder or dust.
3.6 Combustible Material - Capable of reacting with oxygen and burning if ignited.
Examples include oil, paper, various chemicals products, wood, plastic, textile fibers
such as carpet and cardboard.
3.7 Designated Hot Work Area - A permanent or temporary non-hazardous location

designed or approved for hot work operations without a hot work permit. Examples:
Maintenance shops or fab areas.
3.8 Operations - The person assigned to an area / department that normally controls
and operates the equipment.
3.9 Flammable Atmosphere - A mixture of dangerous substances with air, under

atmospheric conditions, in the form of gases, vapors, mist or dust which are
ignitable and after ignition has occurred, combustion spreads to the entire unburned
mixture.
3.10 Hot Tap - The technique of attaching a welded branch fitting to piping or equipment
as it remains in service, and then creating an opening in that piping or equipment by
drilling or cutting a portion of the piping or equipment within the attached fitting. Hot
Tapping by definition involves “Level 1” Hot Work on equipment “in service” (see
HSP506 Hot Work on Pressure Boundaries).
3.11 Hot Work- For the purposes of this procedure, hot work can be defined in three
different levels. Additionally, Appendix 1 contains a quick reference guide of
requirements for each Level.
3.11.1 Level 1: High Energy Hot Work – any operations that can produce a spark,
arc or flame hot enough to cause the ignition of ordinary combustible
materials, combustible dusts, flammable gasses or vapors. Examples
include: welding & cutting, burning, resistance welding, soldering, brazing,

torch applied roofing, grinding, abrasive wheel cutting, servicing of electrical
equipment capable of producing sparks or other operations that are capable
of initiating fires or explosions
3.11.2 Level 2: Low Energy Hot Work Hot work requirements for vehicles entering
process units with the potential to become an ignition source. This also
includes stationary internal combustion engines.
3.11.3 Level 3: Power Tool Only – Hot work requirements for the use of electrical
or pneumatic tools not approved for Class 1, Division II areas. This also
includes portable electronic devices.
3.12 Incipient Fire – The initial or beginning stage of a fire, which can be controlled or
extinguished by portable fire extinguishers, Class II standpipe or small hose
systems without the need for protective clothing or breathing apparatus.
3.13 Joint Job Walk (JJW) – a meeting that is held by the operator (permit issuer) and
the worker (permit recipient) that is conducted at the job location where the work is
to be performed. The goal of the JJW is to identify all hazards and perform a
detailed review of the work to be performed and mitigate and manage each hazard
to avoid an incident during the performance of the task.
3.14 Lower Explosive Limit (LEL) - The lower limit of flammability of a gas or vapor at
ordinary ambient temperatures expressed in a percent of the gas or vapor in air by
volume. For the purposes of this procedure, the %LEL limit for hot work permit
authorization is 0.0% LEL. A variance per HSP-103 must be obtained prior to
conducting work with readings above 0.0% LEL.
3.15 PED (Portable Electronic Device) - Any battery-operated device with a battery
larger than a button that has the potential to create a spark when the battery is
removed or is in use.
3.16 Permit Issuer: Westlake Employee who has been identified by Unit Manager and
certified by HSE department to issue permits.
3.17 Portable Electronic Device – Any piece of lightweight, electrically-powered

equipment. These devices are typically consumer electronic devices capable of
communications, data processing and/or utility. Examples range from handheld,
lightweight electronic devices such as tablets, e-readers, and smartphones to small
devices such as MP3 players.
3.18 Work permit - a multifaceted safety planning tool to ensure that necessary safety
precautions have been addressed prior to beginning work on site. This permit is
used to authorize Hot Work.

3.19 Spark Producing Operations - Any activity that produces or has the potential to
produce sparks, such as, but not limited to welding, brazing, soldering, torch or arc
gouging, cutting, grinding, sandblasting, and the use of power tools. Department
supervision should consider the possibility of sparks resulting from scraping,
hammering, pneumatic tools and other operations, and the advisability of obtaining
a hot work permit to cover such work. Vehicles are also capable of producing
sparks.
3.20 Stop Work Authority - A critical piece of a successful safety culture that provides
employees and contract workers with the responsibility and obligation to stop work
when a perceived unsafe condition or behavior may result in an unwanted event.
3.21 Welding blanket/curtain - A heat-resistant fabric designed to be placed in the

vicinity of a hot work operation with light moderate exposures such as that resulting
from chipping, grinding, heat treating, sand blasting, and light welding. Designed to
protect machinery and prevent ignition of combustible materials such as wood that
are located adjacent to the underside of the blanket.
3.22 Welding Pad - A heat-resistant fabric designed to be placed directly under a hot
work operation such as welding and cutting. It is intended for use in horizontal
applications with severe exposures such as that resulting from molten substances
or heavy horizontal welding designed to prevent the ignition of combustible
materials that are located adjacent to the underside of the pad.
3.23 Vehicles – mechanized and /or internal combustion engine-driven equipment used
for carrying or transporting something. Examples include: golf carts, trucks,
forklifts, portable gasoline, diesel or electric pumps, powered compressors, light
plants, etc.
4.0 RESPONSIBILITIES
4.1 Permit Issuer
4.1.1 Ensure that process lines or equipment is cleared, isolated and secured per
the site’s requirements.
4.1.2 Ensure that affected employees (e.g., including contractor personnel) are
aware of hot work taking place in the area or unit.
4.1.3 Ensure the proper applicable work permit is completed.
4.1.4 For shift changes, review on-going hot work activity with affected employees.
4.1.5 Develop an action plan and communicate to authorized employees the means
by which notification will be given if conditions change and work must be

stopped.
4.1.6 See that cutting and welding are scheduled so that plant operations, e.g., that
might expose combustible dust and / or materials to ignition are not started
during hot work activities in the affected area.
4.1.7 Determine if the work can be completed safely or needs to be moved to a

designated hot work area.
4.1.8 Visits the hot work job site, conducts a Joint Job Walk (JJW) and completes an
assessment to ensure the area and process conditions are acceptable for hot
work.
4.1.9 Take necessary precautions to ensure combustible materials have been
removed or controlled within 35 feet of the hot work that is to be performed.
4.1.10 If all combustible materials cannot be removed, ensures that safeguards are in
place to confine the heat, sparks and/or slag.
4.1.11 Cover sewers with non-flammable covers within 35 feet.

4.1.12 Ensure that other potential hazards have been identified such as elevated hot
work, the need for barricading, atmospheric readings as required, the need for
a fire watch, identifying if continuous monitoring is required, and other items as
defined on the permit.
4.1.13 Ensure that sprinkler systems, hose systems and other fire protection and/or
extinguishing systems or equipment in the area where hot work is to be
performed is verified as operational or ensure approved alternative fire
protection measures are in place such as wheeled or portable fire
extinguishers.
4.1.14 Complete a detailed review of the hot work permit with the authorized
employees and crew leader.
4.2 Maintenance Crew
4.2.1 Review and comply with all requirements of the safe work permit procedure.
4.2.2 Contractors shall ensure that all their crew(s) maintain compliance with all hot
work requirements when performing hot work on Westlake’s property.
4.3 Maintenance Crew Leaders
4.3.1 Participate in Hot Work Pre-planning Meeting.

4.3.2 Participate in the Joint Job Walk with Permit Issuer.
4.3.3 Ensure that only qualified and authorized employees perform hot work activities.
4.3.4 Ensure that employees who are found to have insufficient skills or understanding
of hot work procedures do not perform hot work activities and receive retraining
before conducting any hot work activities.
4.3.5 Ensure that the authorized employees utilize the required PPE for the hot work
to be performed to include approved welding garment protection for torso, arms
and hands and proper PPE to protect the face, head and eyes.
4.3.6 Provide appropriate job safety instruction (i.e. potential hazards, restrictions of
the job, etc.) to the authorized employees.
4.3.7 Notify the Permit Issuer of the need to update the hot work permit when
authorized workers are away from the job for more than 30 minutes.
4.3.8 When the hot work is complete, notify the Permit Issuer so that the hot work
permit can be closed. The hot work permit should not be closed until 30
minutes following the hot work activities.
4.3.9 Assign a qualified fire watch to the hot work site when required who will remain
at the job site for 30 minutes following the hot work activities.
4.3.10 Review all applicable permits written for the hot work activities with the
authorized employees performing the work and initiate dialog on potential
hazards associated with the hot work.
4.3.11 Verify that all atmospheric monitoring when required has been completed and
that all readings are within acceptable and approved ranges for hot work
activities.
4.4 Authorized Employee
4.4.1 Activate “Stop Work Authority” when unsafe work conditions or at-risk behavior
is observed.
4.4.2 Be qualified as a hot work permit receiver per the site’s permit procedure.
4.4.3 Be trained and qualified to perform the level of hot work assigned by the
employer.

4.4.4 Inspect designated hot work area(s) for combustibles and other hazards prior to
beginning hot work activities.
4.4.5 Utilize the required personal protective equipment for the type of hot work to
be performed to include approved welding garment protection for torso, arms
and hands and proper PPE to protect the face, head and, eyes.
4.4.6 Be present and participate in all hot work Joint Job Walk.
4.4.7 Review and understand all requirements of the hot work permit and ensure that
necessary approvals have been granted prior to beginning any hot work
activities.
4.4.8 Follow the requirements and/or precautions documented on the hot work permit
and ask questions as necessary.
4.4.9 Inspect, operate, and handle equipment properly so as not to endanger lives
and property.
4.4.10 Perform hot work only when conditions are safe and stop if conditions change
from the permitted conditions.
4.4.11 Notify either the Permit Issuer or operations supervisor of the employees
performing the work of an absence from the job of 30 minutes or more.
4.4.12 Notify either the equipment owner supervisor or operations when the hot work
task is complete.
4.5 Fire Watch
4.5.1 Activate “Stop Work Authority” when unsafe work conditions or at-risk behavior
is observed.
4.5.2 The fire watch must wear a highly visibility color vest and have appropriate
fire extinguishing equipment and alarm air horn in a state of readiness
throughout job completion.
4.5.3 The fire watch must be familiar with plant emergency procedures and trained
in accordance with OSHA 29CFR1910.252.
4.5.4 The fire watch must look for fires in all hot work areas and try to extinguish
them when capable, sound the alarm air horn and contact Permit Issuer.
4.5.5 The fire watch will keep the area wet down when applicable and will, in the
event of an emergency, stop the hot work.

4.5.6 A fire watch must be present 30 minutes after all hot work operations are
completed.
4.5.7 The fire watch cannot leave the area when hot work activities have started
without the supervisor first assigning another trained person to relieve them.
4.5.8 Fire watch must be trained and qualified to monitor and observe hot work
activities.
4.5.9 The fire watch must participate in all pre-job meetings and read the permit
and additional Fire Watch responsibilities (listed on back) and sign accepting
the requirements.
5.0 PROCEDURE
5.1 HIERARCHY OF CONTROLS
5.1.1 Hot work can only be permitted when the process or electrically classified
area is free of combustible and or flammable materials and or combustible
dusts and atmospheric monitoring is within acceptable ranges. If this cannot
be accomplished the hot work should be relocated outside the electrically
classified or process area to a designated hot work area.
5.1.2 Eliminate ignition sources by selecting alternative work methods, equipment

or moving the location of the hot work to a non-hazardous location
5.1.3 Implement safeguards and controls (e.g., fire blankets, enclosures and
wetting or cleaning surfaces)
5.1.4 Mandatory Respirator Selection Guide for Performing Hot Work on Specific
Metallurgies
5.1.4.1 When permitting hot work, you shall use the “Mandatory Selection Guide
for Performing Hot Work on Specific Metallurgies” (Appendix 2) to
identify the appropriate respiratory protection.
5.1.4.2 If respiratory protection is required, this respiratory protection must be

identified on the Safe Work Permit.
5.2 DESIGNATED HOT WORK PERMIT AREAS
5.2.1 Hot work permits are required in all plant operating areas including tank
farms except:

5.2.2 Maintenance shops (unless equipment to be cut/welded has previously

contained a flammable material).
5.2.3 Areas specifically designated by the Process Owner and HSE department as
construction sites unless located within the perimeter of a process area.
5.3 PROHIBITED HOT WORK AREAS
5.3.1 In areas not authorized by Permit Issuer;
5.3.2 In the presence of atmospheres with LEL > 0.0%; and
5.3.3 On unclean or improperly prepared tanks, pipes, vessels, etc., that may
develop atmospheres with LEL > 0.0%. See HSE-507 Process Opening.
5.4 PRE-PLANNING REQUIREMENTS FOR HOT WORK IN PROCESS AREAS
5.4.1 A detailed description of the work will be submitted to Operations far enough
in advance for evaluation.
5.4.2 Preplanning will be the responsibility of the employee directly in charge of

supervising the work in some cases this will be the crew leader.
5.4.3 When hot work is considered, a Permit Issuer must be contacted to obtain
the hot work permit as specified on the Work permit.
5.4.4 Permit Issuer will give approval if satisfied that hot work is necessary and
can be accomplished in a safe manner.
5.4.5 A fire watch must be assigned prior to issuing the permit for all Level 1 –
High Energy Hot Work.
5.5 GENERAL REQUIREMENTS
5.5.1 Hot work permits will follow the same requirements as Work permit.
5.5.1.1 Permits may be written for the duration of the shift.
5.5.1.2 Permit must be present at jobsite
5.5.2 Hot work permits will become void and work will shut down immediately if:
5.5.2.1 The plant emergency alarm system sounds

5.5.2.2 Presence of uncontrolled flammable gas, vapor or combustible

materials
5.5.2.3 Operations deems it necessary to stop the work
5.5.2.4 Atmospheric monitoring results become unacceptable
5.5.2.5 The presence of any fire
5.5.2.6 Any other changing conditions that should be addressed before

continuing work
5.5.2.7 The permit may be reissued once the "All Clear" is sounded
5.6 HOT WORK (LEVEL 1 – HIGH ENERGY HOT WORK) CONDUCTED IN

PROCESS AREAS
5.6.1 Operations that can produce a spark, arc or flame hot enough to cause the
ignition of ordinary combustible materials, combustible dusts, flammable
gasses or vapors.
5.6.2 Requirements:
5.6.2.1 A fire watch who shall not be assigned any other duties.
5.6.2.2 Initial Atmospheric monitoring for LEL shall be recorded on the

permit.
5.6.2.3 Continuous atmospheric monitoring for LEL shall be required for

the duration of the hot work activity in Class 1 Division 2 areas.
5.6.2.4 All hot work will be conducted following OSHA's 29CFR 1910.252
"Welding, Cutting and brazing."
5.6.2.5 If the object to be welded or cut cannot be readily moved, all

moveable fire hazards in the vicinity will be taken to a safe place.
5.6.2.6 Guards or shields must be used to protect immovable fire hazards

from heat, sparks, and slag.
5.6.2.7 Fire blankets may be used as protective curtains when necessary.
5.6.2.8 If sewers, trenches, and low spots are within a 35-foot radius of
Level 1 – High Energy Hot Work, and a reasonable potential exist
for the presence of a flammable material then they must be:
5.6.2.9 Covered with fire blanket and wet down.
5.6.2.10 All combustible dust and / or materials should be relocated or

precautions taken to prevent ignition of combustibles from thermal
conduction or radiation when welding is performed on the other
side of metal walls, partitions, ceilings, or roofs.
5.6.2.11 When welding at elevated heights precautions must be taken to

prevent sparks from contacting combustible materials below.
5.6.2.12 Any pipelines or connections to drums or vessels containing

hazardous materials must be disconnected or blanked before
welding, cutting, or other hot work.
5.6.2.13 Work areas must be cleared of all movable combustible materials,

where practical, for a radius of 35 feet, including dry grass,
sawdust, and other materials.
5.6.2.14 If hot work will be performed in a sprinkler area, the sprinkler

system must be in service.
5.6.2.15 An approved fire extinguisher must be provided by the permit

requestor or work crew and located at the job site. Emergency fire
extinguishers located throughout the unit cannot be used to meet
this requirement.
5.7 HOT WORK (LEVEL 2 – LOW ENERGY HOT WORK)
5.7.1 A safe work permit will be issued for all vehicles and any other internal
combustion engine-driven equipment taken into an operating unit. (Example:
trucks, forklifts, portable gasoline, diesel or electric pumps, powered
compressors, light plants, etc.)
5.7.2 The Permit Issuer must conduct an initial atmospheric monitoring for the
area in which the vehicle entry will be used and document the readings on
the permit.
5.7.3 Continuous running equipment in high hazard areas (Class 1 Div. 2) shall
never be left unattended. The area operator is responsible to control access
into these areas via use of vehicle access gates, cones or chains.
5.7.4 If a vehicle will be in and out of the unit in a reasonable amount of time, initial
monitoring may be acceptable.
5.7.5 The Maintenance Crew Leader or vehicle driver will obtain clearance from
the appropriate unit control room for the vehicle and/or equipment to enter
the operating unit. The permit will be signed by Permit Issuer.
5.7.6 Permitted equipment will be immediately shut down by the personnel

performing the hot work in the event the plant emergency alarm system is
sounded. The permit will become invalid and may be reissued once the “All
Clear” is sounded.
5.7.7 A fire watch shall not be required.
5.8 HOT WORK (LEVEL 3 - POWER TOOLS ONLY)
5.8.1 Work requiring the use of electrical or pneumatic power tools that are not
approved for Class I Division II areas (etc.) must be permitted for hot work
with the designation of power tools only.
5.8.2 The Permit Issuer must conduct an initial flammable gas check of the area in
which the power tools will be used and document the readings on the permit.
5.8.3 Hot Work for Power Tools Only will not require the use of a fire watch unless
sparks are produced (i.e. use of Metabo saw)
5.8.4 Permitted equipment will be immediately shut down by the operator in the
event the plant emergency alarm system is sounded. The permit will
become invalid and may be reissued once the “All Clear” is sounded.
5.8.5 An approved fire extinguisher must be obtained and located at the job site if
sparks will be produced. Important: Emergency fire extinguishers located
throughout unit cannot be used to meet this requirement.
5.8.6 Portable Electronic Devices (PED) will follow the same requirements with the
exception of the fire extinguisher requirement.
5.9 HOT WORK IN CONFINED SPACES
5.9.1 Hot work inside of confined spaces requires continuous monitoring.
5.9.2 Hot work in confined spaces will follow all requirements of Westlake's HSP-
503 Confined Space Permit Program. When hot work is suspended for a
period of time (30 minutes or greater) in a confined space (such as during
breaks, lunch, or overnight):

5.9.2.1 Atmospheric conditions must be verified and documented in the

acceptable range prior to restarting hot work
5.9.2.2 Torch valves must be closed.
5.9.2.3 The gas applied to the torch must be positively shut off at some
point outside the confined space; and
5.9.2.4 The torch and hose must be removed from the confined space.
5.9.2.5 All electrodes must be removed from the holders;
5.9.2.6 The holders must be located so that accidental contact cannot

occur; and
5.9.2.7 Combustion engine machines and electrical machines must be

turned off and electric machines must be disconnected from the
power source.
5.9.3 Hot work in confined spaces is prohibited if any of the atmospheric

conditions are not within the acceptable ranges-no exceptions.
5.10 ATMOSPHERIC MONITORING REQUIREMENTS
5.10.1 The work area including all lower levels of elevated structures, sewers,
trenches, and low spots near hot work sites must have an Initial Atmospheric
Monitor test per the protocol below.
5.10.2 All readings must be recorded on the Work permit. Level 1 -High Energy Hot
Work will require Continuous Atmospheric Monitoring in Class 1 Div. 2
following the same protocols.
5.10.3 Atmospheric Monitoring equipment must be calibrated and function tested

per manufactures requirements. Calibration date, instrument name and
function test must be documented on the permit with the Permit Issuer
signature.
5.10.4 Atmospheric testing will include:
5.10.4.1 Oxygen (O2) (19.5 to 21.5%)
5.10.4.2 Combustible gas (LEL) (=0%)

Readingsgreaterthan0%requireanapprovedvarianceper
Westlake’sDeviationProcedure(HSP-103)
5.10.4.3 Toxicity (for example, VCM, EDC), if potential for toxins exist during
Hot Work
5.10.4.4 All employees conducting atmospheric monitoring will be trained in

the operation of atmospheric monitoring equipment
5.11 HOT WORK ACTIVITIES IN NON-PROCESS LOCATIONS NOT IDENTIFIED AS

“DESIGNATED HOT WORK AREAS”
5.11.1 An approved fire extinguisher shall be located at the job site.

5.11.2 Hot Work permits in these areas will be voided under the same conditions as
section 5.5.2 of this procedure.
5.12 HOT TAP
5.12.1 A hot tap permit will be issued in addition to the safe work permit for all hot
tap activities (see HSP-506_3 Hot Tap Checklist).
6.0 TRAINING
6.1 Training will be conducted initially and when there are changes in the workplace or
technology that requires modification of the Hot Work Procedure. Refresher training
shall be required if there is evidence that there is a lack of knowledge regarding the
hot work procedures or work practices as identified through the site hot work program
assessment.
6.2 The training will be documented and stored in an approved database (i.e. Westlake’s
Learning Management System).
6.3 Training content will be determined by and appropriate for designated roles and
responsibilities associated with hot work activities. (i.e. Those individuals who are
responsible for conducting atmospheric monitoring must be trained in the operations
of atmospheric monitoring equipment. Those designated to be fire watches must be
trained in all duties and operation of equipment utilized while serving as a fire watch).
6.4 All Westlake employees and contractors involved in hot work operations will be
trained on the site’s Hot Work Procedure including the roles and responsibilities and
the Hot Work Permitting process.
6.5 Westlake will provide location specific hot work requirements to contractors
conducting hot work.
6.6 An evaluation of the effectiveness of the Hot Work Program shall be conducted
annually and shall include:
6.6.1 Review a sampling of permits on a periodic basis.
6.6.2 Periodically interview individuals involved in hot work operations.
6.6.3 Periodically conduct observations of hot work jobs.
6.6.4 Documentation of identified gaps.
6.6.5 Documentation of corrective actions taken to address gaps.
7.0 RECORDKEEPING
7.1 Permits will be kept by Operations for one week following work completion by each
department.
7.2 This procedure will be controlled in http://gvcdocs.
8.0 PROCEDURE REVIEWS
8.1 The Hot Work procedure will be reviewed at least once every three years. The HSE
Department will ensure this review is performed to assess compliance.
9.0 REFERENCES
9.1 Occupational Health and Safety Administration's 29 CFR 1910.119(k) (February 1992)
Process safety management of highly hazardous chemicals – “Hot work permit”.
9.2 Occupational Health and Safety Administration's 29 CFR 1910.252(a) (June 1990).
Welding, Cutting and Brazing – General Requirements “Fire prevention and protection”.
9.3 Environmental Protection Agency 40 CFR Part 68.85 (June 1996). Subpart D –
Program 3 Prevention Program – “Hot work permit”.
9.4 HSP-506 Hot Work on Pressure Boundaries
9.5 HSE-507 Process Opening
9.6 HSP- 503 Confined Space Permit Program
9.7 HSP-103 Westlake’s Deviation Procedure
9.8 HSP-506_3 Hot Tap Checklist
10.0 APPENDICES
10.1 Appendix 1 - Hot Work Levels Quick Reference Guide

10.2 Appendix 2 – Mandatory Respirator Selection Guide for Performing Hot Work on
Specific Metallurgies
10.3 Appendix 3 – EXAMPLE: Hot Work Permit (red highlights specific hot work)
RevisionHistory
Rev Changes Approved Date

Revision completed by HSE Manager and
employee committee. Combined previous MOC
8 procedure with VPP and PSM audit HSE-20-17
12/7/2020
recommendations.
Appendix1
HotWorkLevelsQuickReferenceGuide
Initial Continuous
Fire Fire
Level Atmospheric Atmospheric
Watch Extinguisher
Monitoring Monitoring
Level 1 –High Energy Hot Work X X X
Level 1 – High Energy Hot Work in

X X X X
Class 1 Div.2 Area
Level 2 – Low Energy Hot Work X
If sparks
Level 3 – Power Tools Only X
produced

Appendix2
MandatoryRespiratorSelectionGuideforPerformingHotWorkonSpecificMetallurgies

Appendix3-EXAMPLE:HotWorkPermit(redhighlightsspecifichotwork)

504 Hot Work Permit Rev 8

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Document Number: HSP - 504 Current Rev: 1/25/2023

Revised By: Gregory Thorn Review Cycle: 3 years

3.1 Affected Employee - Employees impacted by the performance of permitted work

3.2 Authorized employee – Referred to as Hot Work Permit Receiver - Employees

3.3 Class 1 Hazardous Locations - Flammable gases or vapors are or may be

3.3.1 Division I - Ignitable concentrations of flammable gases or vapors may exist

3.4 Class 2 Hazardous Locations- Combustible dust is or may be present

3.4.1 Division I - Locations were combustible dust is or may be suspended in the

electrically conductive nature may be present.

3.4.2 Division II - Locations where combustible dust will not normally be

3.7 Designated Hot Work Area - A permanent or temporary non-hazardous location

3.9 Flammable Atmosphere - A mixture of dangerous substances with air, under

include: welding & cutting, burning, resistance welding, soldering, brazing,

3.17 Portable Electronic Device – Any piece of lightweight, electrically-powered

Printed controlled copy expires 24 hours after 12:54 PM on 6/8/2021.

3.21 Welding blanket/curtain - A heat-resistant fabric designed to be placed in the

4.1 Permit Issuer

4.1.3 Ensure the proper applicable work permit is completed.

by which notification will be given if conditions change and work must be

4.1.7 Determine if the work can be completed safely or needs to be moved to a

4.1.11 Cover sewers with non-flammable covers within 35 feet.

4.2 Maintenance Crew

4.3 Maintenance Crew Leaders

4.3.1 Participate in Hot Work Pre-planning Meeting.

Printed controlled copy expires 24 hours after 12:54 PM on 6/8/2021.

4.3.2 Participate in the Joint Job Walk with Permit Issuer.

4.4 Authorized Employee

Printed controlled copy expires 24 hours after 12:54 PM on 6/8/2021.

4.5 Fire Watch

Printed controlled copy expires 24 hours after 12:54 PM on 6/8/2021.

5.1 HIERARCHY OF CONTROLS

5.1.2 Eliminate ignition sources by selecting alternative work methods, equipment

5.1.4.2 If respiratory protection is required, this respiratory protection must be

5.2 DESIGNATED HOT WORK PERMIT AREAS

Printed controlled copy expires 24 hours after 12:54 PM on 6/8/2021.

5.2.2 Maintenance shops (unless equipment to be cut/welded has previously

5.3 PROHIBITED HOT WORK AREAS

5.3.1 In areas not authorized by Permit Issuer;

5.3.2 In the presence of atmospheres with LEL > 0.0%; and

5.4 PRE-PLANNING REQUIREMENTS FOR HOT WORK IN PROCESS AREAS

5.4.2 Preplanning will be the responsibility of the employee directly in charge of

5.5 GENERAL REQUIREMENTS

5.5.1.1 Permits may be written for the duration of the shift.

5.5.1.2 Permit must be present at jobsite

5.5.2.1 The plant emergency alarm system sounds

Printed controlled copy expires 24 hours after 12:54 PM on 6/8/2021.

5.5.2.2 Presence of uncontrolled flammable gas, vapor or combustible

5.5.2.3 Operations deems it necessary to stop the work

5.5.2.4 Atmospheric monitoring results become unacceptable

5.5.2.5 The presence of any fire

5.5.2.6 Any other changing conditions that should be addressed before

5.6 HOT WORK (LEVEL 1 – HIGH ENERGY HOT WORK) CONDUCTED IN

5.6.2.2 Initial Atmospheric monitoring for LEL shall be recorded on the

5.6.2.3 Continuous atmospheric monitoring for LEL shall be required for

5.6.2.5 If the object to be welded or cut cannot be readily moved, all

5.6.2.6 Guards or shields must be used to protect immovable fire hazards

5.6.2.7 Fire blankets may be used as protective curtains when necessary.

5.6.2.9 Covered with fire blanket and wet down.

5.6.2.10 All combustible dust and / or materials should be relocated or

5.6.2.11 When welding at elevated heights precautions must be taken to