Doc. No.: LL-D-9999-014-00
Longson Petrochemicals Co., Ltd.
Type:
Workflow
Function: LLDPE
No: LL-D-9999-014-01
Rev.1
FIELD OPERATOR
Subject: PTW Workflow
SUPERVISOR
GATEKEEPER
Page: 1 of 1
SM/DM
MAINTENANCE
HSSE
MTN work planning date
Start
Submit WMS, JSA and
attachments
NO
Critical
YES
Review WMS, JSA and attachments
Organize a meeting
to get approvals
from Operation and
HSSE
NO
Get
approval
YES
Review WMS, JSA
and all attachments
Approval
Printed by Nguyen Van Nguyen on 17/06/2026 15:42 (Effective Date : 14/03/2024)
Put in MTN work plan
(Gatekeeper file)
Submit PTW with all
attachments in "submit" box
NO
Submit PTW date
YES
Apply LOTO
(refer to workflow LL-D-9999-018-00)
1. Sign PTW
2. Run number of PTW in
cover page
3. Write down running number
in each PTW
4. Put in "open" box
Review PTW and all attachments
Approval
NO
YES
Note.1:
For critical: Department Manager
For non-critical: Section Manager
Sign approve WMS, JSA
and all attachments
(refer note.1)
Receive approved PTW,
bring to site for approvals and
apply mitigation according to
JSA
NO
Critical
YES
Verify at site
1. Safety condition
2. Verify and sign in JSA
3. Toolbox meeting by MTN
Approval at site
Execution date
YES
Start work
Observe work to ensure
correctness according to WMS
Observe work to ensure
correctness according to WMS
Finish work
Tidy up working place
1. Check work completeness
2. Check 5S after work
3. Turn off power of facilities of conitnuos work
4. Sign RTO form
5. Sign close PTW at site
NO
Approval at site
Put PTW in "close" box
YES
1. Summarize PTW status in
cover pages
2. Put all cover page together
with all PTW
3. Keep yellow copy of PTW in
cabinet
4. Return master PTW to HSSE
Finish
Verify at site
1. Safety condition
2. Verify and sign in JSA