Responsibilities of piping engineer
2) Review of process package;
3) Giving inputs to civil, vessel, electrical / instrumentation groups for various purposes.
2. Stress analysis
3. Procurement assistance;
4. Preparation of drawings for statutory approvals;
5. Preview of vendor drawings;
6. Coordination with various engineering groups & site.
Responsibilities of piping engineer
Arranging all plant units in a logical manner to take care of Material flow, statutory requirements, & good engineering Practices. -
Document showing layout of all equipments satisfying the Process requirements, safety & statutory Regulations, operability ease of maintenance & economy.
Document showing layouts of piping network to carry fluids From one equipment to another in a process plant satisfying The requirements as mentioned above.
Activities of piping design engineer:
Basic engineering documents:
Details engineering documents:
Review of process package
Review of P & ID’s:
Review of other documents:
1) Utility summary:
2) Conceptual equipment layouts:
3) Piping material specification:
2. Raw material storages
3. Finished product storage
4. Utility generation areas
5. Pipe racks
7. Facility blocks e.g. Work shop ,weigh bridge, canteen,
8. Administration lock, security , car/lorry park etc.
9. Flare system,
12. Future requirements etc.
· Access road, rail road
· Incoming utilities e.g. Electrical, Power, Water,
· Feed stock etc.
· Wind direction
· Facilities around the plot etc.
- factory inspector
- chief controller explosives
- tariff advisory committee
- pollution board
- local bodies
- aviation authorities
- hazardous area classification
2) Pipe racks
3) Electrical & instrument cable trays.
4) MCC and control rooms
5) A/C ducting
6) Offices & maintenance areas
7) Building features including columns, beams, walls, floor Openings, staircases, passages etc.
8) Show tube removal space for heat exchangers
9) Show monorails lifting bays & hoists etc.
- Developing equipment layouts
- Process requirements
- Operations & maintenance requirements
- Hazardous area classification
- Safety requirements
- Factory inspector’s requirements
- TAC requirements
- Civil requirements
- Erection / dismantling requirements
- Future provisions
Basic engineering documents
Pipe rack study sketches:
Study piping layouts:
- Utility flow diagram (UFD)
- This document is similar to P&ID’s
- Prepared based on utility summary
- Prepared based on utility summery furnished by process group
- Shows utility generation and distribution in the plant.
Line numbering and line list
Critical line list
3) Utility P&ID’S
4) Line designation list
5) Piping specification
6) Equipment data sheets /vendor drawings
7) Civil drawings
8) Inline instrument details
9) Insulation requirements
Following points shall be kept in mind while developing piping layouts
Process requirements e.g.
- Instrument requirements e.g.
- Straight length for flow measurement
- Location of control valves, safety valves,
- PLS, TIS, etc.
- Safety requirements
- Operations & maintenance
- Service /hose stations, safety showers
Piping layouts must consider
- Process requirements operations & maintenance requirements area classification
- Safety requirements factory inspector’s requirements TAC
- Requirements civil requirements erection / dismantling requirements future provisions.
Why stress analysis?
Stress analysis ensures
2. Flexibility of pipe from thermal expansion.
3. Safety of nozzles to the connected critical equipments
4. Proper supporting against dead weight, thermal expansion & occasional loads like & earthquake
5. Proper selection and specification of special supports like spring hangers and expansion joints.
Stress analysis is carried out for
- Stress critical lines
- Elevated temperature lines
- 80 NB & above > 260 deg c.
- 150 NB & above> 120 deg c
- Equipment critical lines
- Lines connected to rotating machinery - pump (API 610), turbine (NEMA - SM23) reciprocating compressor
- Fired heater (API 560), air cooler(API 661), reformer vessels with brittle linings
- Analysis to ensure the nozzle loads within stipulated maximum
- Specified by codes /equipments vendors.
Support critical lines
How Stress Analysis is carried out?
2) Chief inspector of boilers
3) Chief controller of explosives
A) Petroleum act & rules ( for storage tanks)B) Gas cylinder & static & mobile pressure vessel rules
5) Tariff advisory committee
6) Pollution control board
7) Local bodies ( Municipal / District authority, port authority, Aviation authority, highway authority etc.
8) electrical inspection
9) town planning authority.
Responsibility of piping engineering at site
2) Co-ordination with clients, contractors, & detail engineering office.
3) Planning & monitorin g the work for timely completion of the project.
4) Conduct welding procedure & performance qualifications
5) Assure the quality of work done by contractors.
6) Maintain QA/QC records.
7) Assure the lifting equipments tools & tackles are in proper condition.
8) Check the alignments of equipments.
9) Assure the work is carried out as per P & ID’s, layouts drawings & isometrics.
10) Check critical pipe supports
11) Check visual inspection & radiography of weld joints
Responsibility of piping engineering at site Testing of piping
Computer in Piping Engineering
- Autocad I Microstation
- PDS / PDMS ( 3D plant design system)
- Auto plant / Tata -Cape auto flow
- Caepipe / Ceaser-II / Triflex
Advantages and uses of various software packages
A) Autocad / Micro Station
B) Plot plans
C) Equipments layouts
D) Piping plans
T) Piping support drawings
B) Neat drawings
C) Fast modifications
D)Copying of identical parameters
PDS / PDMS ( 3D - Plant Design System)
• Ducting layouts
• Cable tray layouts
• Isometrics & material take-off
Software for stress analysis
- Caeser – II
- Network setup
- Refer enclosed line diagram
- Giving network component
- Connectivity both for LAN and WAN