API 570 data sheets - Dimesions

Question 0

NDE - Maximum Length of crack or incomplete fusion allowed on a new weld

Answer 0

0”

B31.3 Tbl 341.3.2

Question 1

Design -Mill Tolerance For rolled and welded pipe

Answer 1

• 0.010”

574: 4.1.13

Question 2

Flanges - Typical flange face finish

Answer 2

125 - 250 micro inch

B16.5: 6.4.5.3

Question 3

Flanges - When mating flanges, the maximum amount of un parallel allowed (per diameter of flange in feet)

Answer 3

1/16” per foot

B31.3: 335.1.c.1

Question 4

Flanges - Max offset four bolt-holes for mating flanges

Answer 4

1/8”

B31.1: 335.1.c.3

Question 5

Welding - Maximum allowed size of open discontinuity in a bend test

Answer 5

1/8”

Sect IX: QW-163

Question 6

Preheat Zone - Distance from toe of weld

Answer 6

1”

B31.3: 330.1.4

Question 7

PWHT Zone - Distance from toe of weld

Answer 7

1”

B31.3: 331.2.6

Question 8

NDE- Minimum distance beyond the area to be examined to clean a part when performing a MT examination

Answer 8

1”

Sect V: T-741.1.b

Question 9

NDE- Minimum distance beyond the area to be examined to clean a part when performing a PT examination

Answer 9

1”

Sect V: T-642.b

Question 10

Repairs - Minimum radius of insert patch

Answer 10

1”

570: 8.1.4.2.c

Question 11

NDE- Max diameter of CML exam point for lines less than 10 NPS

Answer 11

2”

570: 3.1.20

Question 12

NDE- Max diameter of CML exam point for lines greater than 10 NPS

Answer 12

3”

570: 3.1.20

Question 13

NDE- Minimum length of spot RT

Answer 13

6”

B31.3: 344.5.2.c

Question 14

Welding - Minimum length to RT/UT when qualifying a welder with test coupon or 1st production weld

Answer 14

6”

IX: QW- 302.2/ 304.1

Question 15

Welding- Minimum length of RT when qualifying a welding operator with RT RT/UT a test coupon.

Answer 15

6”

IX: QW-302.2

Question 16

Corrosion- soil-to air area - Distance from Interface

Answer 16

6”

570: 3.1.87

Question 17

Corrosion- Distance to dig when inspecting for soil - to - air corrosion

Answer 17

6”-12”

574: 7.4.5

Question 18

NDE- Distance Of eye to part to count as a visual exam

Answer 18

6”-24”

577: 9.3.1.e

Question 19

Corrosion- soil-to-air area distance and soil from interface

Answer 19

12”

570: 3.1.87

Question 20

NDE - Minimum upstream limit of intensive examination of injection point circuit

Answer 20

12”

570: 5.5.9

Question 21

PWHT-Minimum overlap for a PWHT when using multiple heats

Answer 21

12”

B31.3: 331.2.5

Question 22

Welding- Minimum length RT/UT when Qualifying a welding operator on first production weld

Answer 22

3”

IX: QW-305.1

Question 23

Underground - Minimum length of Buried pipe to expose when excavating for inspection

Answer 23

6-8’

570: 9.3.6

Question 24

Repairs- Maximum size of fillet weld patch on pipe

Answer 24

1/2” diameter

570: fig c.2

Question 25

Circuits- Minimum upstream limit of injection point circuit

Answer 25

Greater of 12” or 3 “ inch diameter

570: 5.5.9

Question 26

NDE- Minimum downstream limit intensive examination of injection point circuit

Answer 26

10 diameters

570: 5.5.9

Question 27

Circuits- Minimum downstream limit of injection point circuit

Answer 27

Lesser of:

1st direction change +/- 25’ OR 2nd direction change