Typical Piping Tie-in Drawing Iso
Tie-in list and line list in an important document for a planner to plan for piping tie-in. A Tie-In List should (or may) have the following:
- Tie-In No.
- P&ID No.
- Piping Plan No
- Tie-In Iso. No. (if different than Line Number)
- Line No.
- Connection Type
- Commodity [piping or process]
- Operation Pressure.
- Operation Temperature
- Test Media
- Test Pressure
Using Step to plan for Tie-in in Primavera
There are two basic conditions that exist when doing a "Tie-In." The first condition is when a Tie-In must be made and the line can be shut down and made safe for welding or other work. This is called a "Cold" tie-in.
The second condition is when a Tie-In must be made and the line cannot be shutdown. This is called a "Hot-Tap" tie-in.
Some Hot-Tap tie-ins also require a procedure called "Stopple". This is where a second Hot-Tap is made downstream of the first one. The flow is routed through the first tie-in while an articulated plug is inserted into the second Hot-Tap to blank off the flow. Various kinds of work can then be done to the remaining pipe.
A plugging system which is designed to stop flow through a line while equipment being installed, during maintenance work or repairs are being made. A plugging head is inserted into the line through a fitting and flow is stopped and/or redirected through bypass piping. Implies plugging a line, through a previously tapped hole.
A plugging (Stopple) machine is used to temporarily stop the product in an operating pipeline, by acting as a block valve.
When used in conjunction with a bypass line and another plugging machine, product can be rerouted around the isolated section of pipeline, while repairs, alterations, relocations and instrument installations are made to the piping system .
Typical flow in Tie-in Arrangement
As a part of his/her job definition, the Client Construction Representative shall arrange for the contractor to hang the tie-in tags.
After tie-in requirements are approved, the Operations Job Representative and the Client Construction Representative, together with the Contractor shall field mark tie-in locations using tie-in tags available from Document Control.
Tie-in tags typically contain the following information as shown in the Tie-in Tag Form attached to this procedure (tags are available from Document Control):
- Tie-in number
- Project or work order number
- P & ID
- Date Tie-in Tag was hung
- Signatures
- Person hanging the tag
- Client Construction Representative
- Client Operations Job Representative
The Client Construction Representative and contractor will join together to coordinate all preparations necessary to perform the tie-in, including insulation removal, assembly of material needed during the actual tie-in period, temporary supports, and a temporary alternate supply such as an air compressor or generator. Care must be taken to get the proper work permits.
All materials installed prior to the actual tie-in will be tested in accordance with site piping standards. Examples of testing are x-rays, dye penetrant testing, hydro or pneumatic testing.
Once Operations has prepared the system to allow for the tie-in, the work crew shall obtain a work permit. This permit identifies isolation blinds required and all other means necessary to ensure the tie-in work is safely performed. The permit also identifies required special protective equipment such as gloves, acid suits, breathing air, etc. Special procedures such as line drilling, cold cutting, spool removal, etc. shall be listed on the permit.
Upon completion, the tie-in will be tested in accordance with site piping standards. All tags will be removed, and the system will be released to Operations.
No
|
Contractor
|
Client Construction Representative
|
Operations Job
Representative
|
Piping/Project
Engineer
|
1
|
Prepare and
physically install tie-in tags
|
Coordinate
tie-ins with Operations and the Contractor
|
Ensure tie-ins
have been internally reviewed/approved with-in the Operations Organization
|
Generate tie-in
list and obtain approval from the Operations Job
Representative
|
2
|
Work with the
Planner to plan and schedule all field activities
|
Review tie-in
plans and strategies.
|
Sign off and
witness the hanging of tie-in tags
|
Ensure tie-ins
are designed according to Site Standards
|
3
|
Execute tie-ins
at identified location(s), in accordance with all applicable client’s
policies and procedures
|
Sign off and
witness the hanging of tie-in tags
|
Coordinate
preparation and isolation of the system for the tie-in work.
|
Enter SAP
Notification for the planning and scheduling of tie-in work
|
4
|
Inspect tie-in
after completion to ensure new connection is install according
to design
|
Tie-in Installation, Pipeline Erection and Hydro Testing Progress Tracking System
The Progress Tracking System for Tie-in Installation Work
Normally, piping tie-in installation scope is involved in revamp project only. The progress tracking system for tie-in work includes Tie-in Tracker Sheet and Progress tracking sheet.
Tie-in numbers against the Isometric drawings and work packages are listed in the tracker sheet. The tie-in type (Bolt-up, cut and weld, hot tap, cold tap and threaded are typical tie-in types in process industry), project area or system name and installed dates are also included in the tracker sheet.
To develop Progress Tracking Sheet for overall Isometric drawings, the following work steps and weight factor percentages are utilized.
1. Preparation ( Scaffold erection if required/remove insulation if required) -20%
2. Tie-in work (Bolt up/cut & weld/hot tap/cold tap/threaded) -70%
3. Inspection (Sign QC document, example : flange make up check list) -10%
The Progress Tracking System for Pipeline Erection Work
Developing procedure of progress tracking system for pipeline erection work is the same as piping fabrication work except work steps and weight factor percentages. To do that, replace the following work steps and weight factor percentages with the existing ones and rearrange the formulae.
1. Material at Erection area - 5%
2. Piping Laying -20%
3. Preparation(align/tack weld) -20%
4. Full Welding Execution -40%
5. Non Destructive Examination - 5%
6. Pipe Support Erection -15%
7. Final Inspection - 5%
The Progress Tracking System for Piping Hydro-Testing
Progress tracking system for piping hydro-test includes test pack status sheet and overall progress tracking sheet. A list of column names such as Test pack number, system number, project area name, Isometric drawing number and work packages shall be included in the test pack status sheet. Test pack status sheet and progress tracking sheet can be created by adopting the same procedure for steel fabrication work except work steps and weight factor.
Use the following work steps and weight factors for Piping Hydro-testing;
1. Preparation -20%
2. Testing -45%
3. Reinstate -25%
4. Clear Punch list -10%
Download link :
Progress Tracking Sheet for Tie-in Work
http://mbx.cm/t/PcYDA
Progress Tracking Sheet for Piping Hydrotest
http://mbx.cm/t/cSa4C
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