Api570 Dimensions

Front 1

Mill tolerance for rolled and welded pipe

Back 1

-0.010 inches

Front 2

Maximum allowed length of crack or lack of fusion in new welds

Back 2

0 inches

Front 3

Typical flanges face finish

Back 3

125 to 250 micro inch

Front 4

When mating flanges, the maximum amount of unparallel allowed (per diameter of flange in feet)

Back 4

1/16”/ft

Front 5

Minimum size of fillet weld on socket weld pipe

Back 5

1/8 inch

Front 6

Maximum offset for bolt holes for mating flanges (two-hole)

Back 6

1/8 inch

Front 7

Maximum allowed size of open discontinuity in a bend test

Back 7

1/8”

Front 8

Preheat zone – distance from toe of weld

Back 8

1 inch

Front 9

PWHT zone-distance from toe of weld

Back 9

1 inch

Front 10

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

Back 10

1 inch

Front 11

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

Back 11

1 inch

Front 12

Minimum radius on patches (both fillet and flush)

Back 12

1” (8.1.4.2.c/Fig C.2)

Front 13

Maximum diameter of TML test point for lines less than or equal to10 NPS

Back 13

2” (3.1.20)

Front 14

Maximum distance between examiners eye and component during VT exam

Back 14

24” (V-T-952)

Front 15

Maximum length of RT when qualifying a welding operator with RT of first production weld

Back 15

36” (3ft) (IX-QW-305.1)

Front 16

Minimum length of buried pipe to expose when excavating for inspection

Back 16

6-8’ (9.3.6)

Front 17

Maximum size of fillet weld patch on pipe

Back 17

1/2 diameter (Fig C.2)

Front 18

Minimum upstream limit of injection point circuit

Back 18

Greater of: 12” or 3 Dia (5.5.9)

Front 19

Minimum downstream limit of intensive examination of injection point circuit

Back 19

10 diameters (5.5.9)

Front 20

Minimum downstream limit of injection point circuit

Back 20

Lesser: 1st direction Chg + 25’ or 2nd direction chg

Front 21

Maximum diameter of TML test point for lines greater than 10 NPS

Back 21

3” (3.1.20)

Front 22

Minimum length of spot RT

Back 22

6” (31.3-344.5.2.c)

Front 23

Minimum length of RT went qualifying a welder with RT

Back 23

6” (IX-QW-302.2/304.1)

Front 24

Distance to dig when inspecting for soil – two Dash air corrosion

Back 24

6” (IX-QW-302.2)

Front 25

Limits of Soil to-Air area – distance in air away from interface

Back 25

6” (3.1.87)

Front 26

Distance to dig when inspecting for Soil to-Air corrosion

Back 26

6”-12” (574-7.4.5)

Front 27

Limits of Soil-to-Air area distance in soil away from interface

Back 27

12” (3.1.87)

Front 28

Minimum upstream limit of intensive examination of injection point circuit

Back 28

12” (5.5.9)

Front 29

Minimum overlap when performing PWHT using multiple heats

Back 29

12” (ft) (31.3-331.2.5)