EF/1699 - 120 MBOPD EARLY PRODUCTION FACILITY FOR RATQA AND ABDALI-NORTH KUWAIT

RISK BASED INSPECTION BASELINE DATA ACQUISITIONGUIDE LINE FOR COLLECTING BASE LINE THICKNESS DATAOF PIPING & STATIC EQUIPMENT2.0GENERAL2.1The equipment to be deployed for this survey is a normal D meter with accuracy of 0.01mm.

2.2The thickness readings shall be taken by technicians qualified to Level II in UT.

2.3The values obtained shall be indicated in the concerned isometrics or vessel drawings as the case may be. An electronic copy of the same also shall be submitted in format furnished. Soft and hard copies of the documents shall be submitted to the company.3.0PIPING3.1Straight Pipe length

3.2.1For straight portion of piping sections, thickness survey shall be carried out at two locations at both ends when the straight portion exceeds 500 mm (total of 8 spots). In the case of double random length pipes, if the straight portion of the pipe exceeds 6m, thickness readings at one more locations at the center of the straight portion shall be taken in addition to the two locations already mentioned (total of 12 spots). Thickness measurements shall be carried out at 4 diametrically opposite spots at each of the locations identified as above.

3.2.2No thickness measurement is required when the length of the straight portion is less than 500 mm. 3.2.3Number of spots to be surveyed on straight pipe section shall be as follows:a)Pipe spools fabricated will have straight pipes of various lengths. Pipe spools with length of straight portion above 500 mm shall be surveyed. For such straight lengths, thickness shall be surveyed at two locations at both the ends of the straight portion as shown in the sketch. This requirement shall remain same even for all single random length pipes. (say up to 6m).

b)In the case of straight lengths with double random lengths (say up to 12m), thickness survey shall be carried out at three locations, the third one at the middle of the pipe length.

c)In both the above cases, thickness shall be taken at 0, 90 180 & 270 , resulting in a total of 8 or 12 spots as applicable.

3.2.4The format in which the data is expected is explained as below.

a)The spots where thickness readings were taken shall be marked up on applicable isometrics with unique number for each of the locations. A,B,C,Ds may be used to represent 0, 90 180 & 270 and running number for identification of spots through the length of the isometric, generally in the direction of flow.

b)When isometrics are developed by the Contractor, the thickness survey agency shall be instructed to mark up the location of the spots in the soft copy of the isometrics also. AUTOCAD shall be the software to be used for producing isometrics. Incase isometrics are not generated, Contractor shall develop a soft copy of the isometric drawing to mark up the location of spots.

3.3Fittings

a)In the case of fittings like Elbows, thickness shall be taken at 9 spots as shown in the following sketch

SHAPE \* MERGEFORMAT

b)For Tee fittings, thickness at three spots shall be taken as shown in sketch below

SHAPE \* MERGEFORMAT

c)Other types of forged fittings like weldolet etc are exempted from the thickness survey.

3.2.5The above mentioned requirements shall be applicable for all lines of size 2 and above.

3.2.6For pipe sizes below 2, the requirement shall be reduced to half of that mentioned above except for the tees. In the case of small bore pipes, thickness measurements shall be carried out using probes suitable for the curvature.

3.2.7A spot mentioned above is the average value of three readings taken at a particular location. The report shall record all the three readings pertaining to a spot and the calculated average.

4.0STATIC EQUIPMENT4.1For Static Equipment, thickness survey shall be carried out for all Pressure Vessels, Drain vessels. Desalter Feed Heater shell, Shell & Channel of Shell & Tube Heat Exchangers. However Diesel storage tanks designed as per ASME Section VIII Div (1) are excluded.4.2Thickness measurements shall be carried out as follows:a)For Shell Courses, 4 spots each at 90 apart at two locations on the shell 150 mm away from the circumferential weld joint (total 8 spots) shall be recorded.b)For Head or dished end, 4 spots each at 90 apart ie. at 4 centerlines at the knuckle radius portion (total 4 spots) shall be recordedc)For Cones, 4 spots each at 90 apart at two locations on the shell 150 mm away from the circumferential weld joint (total 8 spots) shall be recordedd)For Manholes & Nozzles, 2 spots each on nozzle / manhole neck at two diametrically opposite points. In the nozzles / manholes at the sides of horizontal or vertical vessels, the points shall be at 6 Oclock and 3/9 Oclock positions respectively.

e)For cladded vessels, thickness measurements shall be carried out based on calibration verification done on a specimen of same thickness and similar cladding material.

ULTRASONIC THICKNESS MEASUREMENTS (UTM)

LOCATIONREPORT NO:DATEP&ID NO:SERVICESURFACE CONDITION

LINE NO:LINE FROM:LINE TO:

INSP. POINTCOMPONENTSIZEOBSERVED WALL THICK.@ CLOCKWISE DIRECTIONMIN. THKNOMINAL THKINSPECTION REMARKS

12369

1

4

3

2

8

5

7

60

150 mm

4

8

6

2

7

3

1

5

A

D

C

B

A

D

B

C

6

1

4

3

2

5

8

7

6

1

3

2

4

5

7

8

9

1

2

3

EMBED MSPhotoEd.3

SPC-1762-DA-01

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