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1. Valve type CORRECTS at the location
2. Valve test certificate
3. Valve tag as PER P&ID
4. Valve direction of flow as per P&ID
5. GASKET bolts as per isometric & type
6. HANDLE direction
7. Chain wheel installed
8. Valve flange FACE condition

1. All materials shall have material spec and grade stamped or stenciled & clearly marked with permanent marker.
2. All materials, heat no. will be made TRACEABLE to MTC from approved vendor & no material substitution will be done without proper approval from the company.
3. All materials shall be STORED & stacked separately as per material grade.
4. Heat no. shall be transferred before cutting into pipes that have to be cut.
5. All materials shall be color coded as per TRACEABILITY PROCEDURE.

MT:- Only Applicable for ferromagnetic MATERIALS & able to detect both SURFACE & sub surface discontinuities, compare to PT examination it takes less TIME for testing & INSPECTION; Applicable for large temp RANGE.

PT:- Applicable for both ferromagnetic & non ferromagnetic materials & able t detect only surface discontinuities, It requires more time; Applicable for small temp range.

MT:- Only Applicable for ferromagnetic materials & able to detect both surface & sub surface discontinuities, compare to PT examination it takes less time for testing & inspection; Applicable for large temp range.

PT:- Applicable for both ferromagnetic & non ferromagnetic materials & able t detect only surface discontinuities, It requires more time; Applicable for small temp range.

RT:- Uses X-RAY or Gamma ray to detect discontinuities, reveals mostly volumetric. Planar defects & subsurface defects not DETECTABLE easily.

UT:- Uses ultrasonic beam to detect discontinuities reveals both planar & volumetric defects, but size & exact location of defects are not easily IDENTIFIABLE. Possible only on materials that do not refract AT waves.

RT:- Uses X-ray or Gamma ray to detect discontinuities, reveals mostly volumetric. Planar defects & subsurface defects not detectable easily.

UT:- Uses ultrasonic beam to detect discontinuities reveals both planar & volumetric defects, but size & exact location of defects are not easily identifiable. Possible only on materials that do not refract AT waves.

CS:- LOW cost, no chromium content, suitable for non-CORROSIVE service upto 350 degree C, max carbon 0.3%.

SS:- CONTAINS more than 12% Cr, 0.08% C, Suitable for corrosive, cryogenic, High temp SERVICES, costly.

CS:- Low cost, no chromium content, suitable for non-corrosive service upto 350 degree C, max carbon 0.3%.

SS:- Contains more than 12% Cr, 0.08% C, Suitable for corrosive, cryogenic, High temp services, costly.

If for justifiable safety REASONS the UG line must be backfilled, then the joints shall remain exposed during TESTING, OTHERWISE the TEST shall be a 24 hour recorded test.(JERES-L-150 Para 7.4.2).

If for justifiable safety reasons the UG line must be backfilled, then the joints shall remain exposed during testing, otherwise the test shall be a 24 hour recorded test.(JERES-L-150 Para 7.4.2).

• Guide support
• MOVING saddle support
• Expansion BALLOONS
• SHOE support
• SPRING LOADED

1.5mm-3mm (ASME B31.3 FIG 328.5.2C).

1.5mm-3mm (ASME B31.3 fig 328.5.2C).

No, should COVER all EXPOSED THREADS (JEREZ-W-011 PARA 12.15.3).

No, should cover all exposed threads (JEREZ-W-011 Para 12.15.3).

No, (JERES-L-110 PARA 8.5).

No, (JERES-L-110 Para 8.5).

Socket weld: - 2” for maintenance & minor modification & 1-½” for new construction.

THREADED:- 1-½” for standard fitting & VALVE, and 2” maximum when required for maintenance, minor FIELD minor modification of existing PIPING system(JERES-L-110 Para 7.2).

Socket weld: - 2” for maintenance & minor modification & 1-½” for new construction.

Threaded:- 1-½” for standard fitting & valve, and 2” maximum when required for maintenance, minor field minor modification of existing piping system(JERES-L-110 Para 7.2).

• Inside surface of welded joints at @ orifice flanges shall be ground & machined smooth (JERES-L-350 Para 10.4.2).
• Orientation of taps is as per JERES-J-0001.
• All parallel pipe lines with adjacent orifice fittings shall have a MIN spacing of 300 mm (12 in) between flanges outside diameters if horizontal taps are required. Where this spacing is not PRACTICAL follow JERSEY-J-0001.

Orifice flanges in adjacent lines shal be staggered so that no two pairs of orifice flanges are LESS than 1 m (3ft) APART.

Orifice flanges in adjacent lines shal be staggered so that no two pairs of orifice flanges are less than 1 m (3ft) apart.

Used in FLANGE joint assemblies which often require frequent separation includes orifice plate, spectacle plates, spacers, screens, and drop out spools shall be provided with jack screw to facility separation and opening for the maintenance. When flange SEPARATIONS are used, JACKSCREWS are not REQUIRED. Jackscrews shall be installed to be accessible from both sides of the pipe. For orifice flanges, jack screws shall be installed at 3 & 9 o’ clock POSITIONS.(JERES-L-310 Para 17.7).

Used in flange joint assemblies which often require frequent separation includes orifice plate, spectacle plates, spacers, screens, and drop out spools shall be provided with jack screw to facility separation and opening for the maintenance. When flange separations are used, jackscrews are not required. Jackscrews shall be installed to be accessible from both sides of the pipe. For orifice flanges, jack screws shall be installed at 3 & 9 o’ clock positions.(JERES-L-310 Para 17.7).

CS:- YIELD strength HIGH; TORQUE VALUE High.

SS:- Yield strength low; Torque value low.

CS:- Yield strength High; Torque value High.

SS:- Yield strength low; Torque value low.

5% of nominal DIAMETER at any cross SECTION other than WELD END & 3% at weld end (JERES-L-350 Para 9.2).

5% of nominal diameter at any cross section other than weld end & 3% at weld end (JERES-L-350 Para 9.2).

12% of NOMINAL WALL THICKNESS.

12% of nominal wall thickness.

VERIFY pipe material thickness by Vernier at the end or UT on SURFACE or stenciling done by the manufacturer (VISUAL) or heat number, TRACEABILITY by MTC of PRODUCT.

Verify pipe material thickness by Vernier at the end or UT on surface or stenciling done by the manufacturer (visual) or heat number, traceability by MTC of product.

• By MATERIAL classification
• SIZE
• RATING
• Joint TYPE (lap, socket, threaded, BUTT), face;

• Material specification
• Pipe size
• Schedule
• Length
• FLANGE face rating
• OLET size rating
• Threaded/socket WELD TYPE
• MTC
• PMI report

NFS:- NORMAL services, CATEGORY M, Category D, HIGH pressure FLUID services (ASME-B31.3).

NFS:- Normal services, Category M, Category D, High pressure fluid services (ASME-B31.3).

PROCESS INDUSTRY PRACTICES.

Process industry practices.

TWO (JERES-A-004, PARA 7.1.5)

Two (JERES-A-004, Para 7.1.5)

Weldolet or WELDED branch with REINFORCEMENT PAD as per JERES-L-110 app: A.

Weldolet or welded branch with reinforcement pad as per JERES-L-110 app: A.

• SHOE
• spring LOADED
• RESTING
• wear PAD

Dead LEGS: Piping sections that are potential for internal corrosion due to flow STAGNATION. 

• Dead legs are CREATED mainly by flow stagnation enhanced with presence of settled water and solid deposits.
• When the length of the section or branch , for 2 inch pipes and larger, is longer than three times its pipe diameter, or 1.22 m (4 ft) in length, the length of the dead leg is the distance measured from the outside diameter of the header (or RUN) to the near end of the branch valve.
• For branch connections of 1-½ inch NPS and smaller, the length of the dead leg is the distance measured from the end of the BOSS to the near end of the valve.

Dead Legs: Piping sections that are potential for internal corrosion due to flow stagnation. 

Weep hole shall be located near base PLATE for all VERTICAL dummy pipe support & near RUN pipe at 6’O clock position for horizontal dummy.(SAES-L-350 13.2.3 & L-310 14.7.2)

Weep hole shall be located near base plate for all vertical dummy pipe support & near run pipe at 6’O clock position for horizontal dummy.(SAES-L-350 13.2.3 & L-310 14.7.2)

1. All hot work shall be completed
2. Strainers shall be removed
3. All NDT & DT completion
4. PWHT completion
5. Adequate attachment
6. Coating on weld joint shall be removed.
7. Calibration of equipments used. Test blind MTC.
8. Test certificates of testing fluid
9. Components in new piping systems which interfere with filling, venting, draining or flushing shall not be installed.(orifice plates, flow nozzles, sight glasses)
10. All joints (flange, threaded, welded or mechanical seals) are left exposed for visual leak detection during the strength test. 
11. All permanent flange joints were inspected, gasket mat'l verified & properly torque.
12. Drains shall be provided at all low points of the piping SYSTEM.
13. Vents and drain valves, both temporary and permanent, conforms with the piping class or rating.
14. Supports are installed. Additional temporary support may be installed as required.
15. Expansion joints and spring hangers or spring supports are provided with temporary restraints. 
16. Arc strikes, gouges, and other indications of careless workmanship (such as surface porosity, uneven weld profiles, and UNDERCUT) shall be removed by grinding and inspected by magnetic particle or liquid penetrant method.
17. Drains are provided immediately above check valves (vertical lines)
18. All threaded joints up to the first block valve of hydrocarbon PIPELINE are seal welded. Thread engagement has been verified & accepted.
19. The pressure testing MANIFOLD is separately pressure tested to at least 1.2 times the system test pressure but not less than the discharge pressure of the pump used for the pressure testing.

Line compliance with Isometrics:

• Correct Materials utilized grade/schedule (Bill of Mat'ls)
• Correct flange and fittings rating
• Construction TOLERANCES per SAES-L-350

Line compliance with Isometrics:

• SAES-L-105
• SAES-L-108
• SAES-L-110
• SAES-L-150
• SAES-L-130
• SAES-L-310
• SAES-L-350
• SAES-L-351

• Size of BOLT
• Calibration of TORQUE wrench
• Manual /HYDRAULIC require
• Lubricant
• FRICTION factor for threaded lubricant
• Torque VALUE
• JERES-L-109 / 351

• Gate valve
• Globe valve
• BUTTERFLY valve
• Needle valve
• Check valve
• Control valve
• Knife gate valve

Based on FUNCTION:-

• non-return valve
• ISOLATION valve
• regulation valve
• special purpose valve

Based on function:-

• ASME B31.3
• ASME B31.1
• ASME B31.5
• ASME B31.9
• JERES-A-004
• JERES-A-007
• JERES-A-206
• JERES-A-301
• JERES-L-105
• JERES-L-108
• JERES-L-110
• JERES-L-150
• JERES-L-130
• JERES-L-310
• JERES-L-350
• JERES-L-351
• JERES-W-011
• JERES-W-016

• LINE routing
• Line orientation
• NORTHING
• Easting & elevation
• Bill of mat’l
• Insulation type
• NDT requirement
• Revision status
• Material class’n
• DESIGN
• Operating & testing temp/pressure
• Paint system
• P&ID
• SLOPE
• Service details
• Flow direction
• Support details
• Notes

FLAT FACE

Raised face

RTJ (Ring TYPE Joint)

Tongue & groove

MALE & female

Flat face

Raised face

RTJ (Ring type Joint)

Tongue & groove

Male & female

• FULL FACE (Asbestos)
• Spiral wound metallic
• Ring type
• Metal jacketed
• INSIDE bolt circle

• Material receiving inspection
• Storage & preservation 
• Cutting, ASSEMBLY & fit-up 
• Pre-welding inspection 
• Visual inspection of socket & threaded joints 
• Pneumatic test for reinforcing pad 
• Pickling & passivation 
• Database REPORTING 
• Visual inspection of completed spools 
• Piping pre-inspection & spool erection 
• orifice FLANGE inspection 
• Pipe support inspection 
• Verification of slope 
• Internal cleanliness 
• Valve installation 
• Piping flange joint inspection 
• Pre-test PUNCH LISTING 
• Hydro testing 
• pre-commissioning