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ANSI / ASME · Class 900

Family: ANSI / ASME flanges
Reference: Class 900 (900 lb)
Standard: ASME B16.5

Dimensional drawing

Welding Neck flange · WN

Dimensioned technical drawing of Welding Neck flange · WN · class 900 · Texas Flange

Threaded flange

Dimensioned technical drawing of Threaded flange · class 900 · Texas Flange

Slip-On flange · SO

Dimensioned technical drawing of Slip-On flange · SO · class 900 · Texas Flange

Lap Joint flange

Dimensioned technical drawing of Lap Joint flange · class 900 · Texas Flange

Blind flange

Dimensioned technical drawing of Blind flange · class 900 · Texas Flange

Enlargeable sectional drawings. Dimensional tables are in mm; NPS retains its nominal designation. RF height shown in the drawings: 1/4″ = 6.35 mm.

Dimensions · Class 900

All dimensions in mm. NPS: nominal designation.

NPSOTRXNo. × hole Ø (mm)Bolt circle Ø (mm)L2HB2LBrL3B3THr
1/2120.6522.3535.0538.104 × Ø22.3582.5560.4521.34--31.7522.353.3031.7522.8622.35
3/4130.3025.4042.9344.454 × Ø22.3588.9069.8526.67--35.0527.693.3035.0528.1925.40
1149.3528.7050.8052.324 × Ø25.40101.6073.1533.53--41.4034.543.3041.4035.0528.70
1-1/4158.7528.7063.5063.504 × Ø25.40111.2573.1542.16--41.4043.184.8341.4043.6930.23
1-1/2177.8031.7573.1569.854 × Ø28.70123.9582.5548.26--44.4549.536.3544.4550.0431.75
2215.9038.1092.20104.908 × Ø25.40165.10101.6060.45--57.1561.987.8757.1562.4838.10
2-1/2244.6041.40104.90123.958 × Ø28.70190.50104.9073.15--63.5074.687.8763.5075.4447.75
3241.3038.10127.00127.008 × Ø25.40190.50101.6088.90--54.1090.689.6554.1091.4441.40
4292.1044.45157.23158.758 × Ø31.75234.95114.30114.30--69.85116.0811.1869.85116.8447.75
5349.2550.80185.67190.508 × Ø35.05279.40127.00141.22--79.50143.7611.1879.50144.5354.10
6381.0055.63215.90234.9512 × Ø31.75317.50139.70168.40--85.85170.6912.7085.85171.4557.15
8469.9063.50270.00298.4512 × Ø38.10393.70162.05219.20--101.60221.4912.70114.30222.2563.50
10546.1069.85323.85368.3016 × Ø38.10469.90184.15273.05--107.95276.3512.70127.00277.3771.37
12609.6079.50381.00419.1020 × Ø38.10533.40200.15323.85--117.60327.1512.70143.00328.1776.20
14641.3585.85412.75450.8520 × Ø41.40558.80212.85355.60--130.30359.1612.70155.70360.1782.55
16704.8588.90469.90508.0020 × Ø44.45615.95215.90406.40--133.35410.4612.70165.10411.2385.85
18787.40101.60533.40565.1520 × Ø50.80685.80228.60457.20--152.40461.7712.70190.50462.2888.90
20857.25107.95584.20622.3020 × Ø54.10749.30247.65508.00--158.75513.0812.70209.55514.3592.20
241041.40139.70692.15749.3020 × Ø66.80901.70292.10609.60--203.20615.9512.70266.70615.95101.60

NPS 1/2

NPS1/2
O120.65
T22.35
R35.05
X38.10
No. × hole Ø (mm)4 × Ø22.35
Bolt circle Ø (mm)82.55
L260.45
H21.34
B2--
L31.75
B22.35
r3.30
L331.75
B322.86
THr22.35

NPS 3/4

NPS3/4
O130.30
T25.40
R42.93
X44.45
No. × hole Ø (mm)4 × Ø22.35
Bolt circle Ø (mm)88.90
L269.85
H26.67
B2--
L35.05
B27.69
r3.30
L335.05
B328.19
THr25.40

NPS 1

NPS1
O149.35
T28.70
R50.80
X52.32
No. × hole Ø (mm)4 × Ø25.40
Bolt circle Ø (mm)101.60
L273.15
H33.53
B2--
L41.40
B34.54
r3.30
L341.40
B335.05
THr28.70

NPS 1-1/4

NPS1-1/4
O158.75
T28.70
R63.50
X63.50
No. × hole Ø (mm)4 × Ø25.40
Bolt circle Ø (mm)111.25
L273.15
H42.16
B2--
L41.40
B43.18
r4.83
L341.40
B343.69
THr30.23

NPS 1-1/2

NPS1-1/2
O177.80
T31.75
R73.15
X69.85
No. × hole Ø (mm)4 × Ø28.70
Bolt circle Ø (mm)123.95
L282.55
H48.26
B2--
L44.45
B49.53
r6.35
L344.45
B350.04
THr31.75

NPS 2

NPS2
O215.90
T38.10
R92.20
X104.90
No. × hole Ø (mm)8 × Ø25.40
Bolt circle Ø (mm)165.10
L2101.60
H60.45
B2--
L57.15
B61.98
r7.87
L357.15
B362.48
THr38.10

NPS 2-1/2

NPS2-1/2
O244.60
T41.40
R104.90
X123.95
No. × hole Ø (mm)8 × Ø28.70
Bolt circle Ø (mm)190.50
L2104.90
H73.15
B2--
L63.50
B74.68
r7.87
L363.50
B375.44
THr47.75

NPS 3

NPS3
O241.30
T38.10
R127.00
X127.00
No. × hole Ø (mm)8 × Ø25.40
Bolt circle Ø (mm)190.50
L2101.60
H88.90
B2--
L54.10
B90.68
r9.65
L354.10
B391.44
THr41.40

NPS 4

NPS4
O292.10
T44.45
R157.23
X158.75
No. × hole Ø (mm)8 × Ø31.75
Bolt circle Ø (mm)234.95
L2114.30
H114.30
B2--
L69.85
B116.08
r11.18
L369.85
B3116.84
THr47.75

NPS 5

NPS5
O349.25
T50.80
R185.67
X190.50
No. × hole Ø (mm)8 × Ø35.05
Bolt circle Ø (mm)279.40
L2127.00
H141.22
B2--
L79.50
B143.76
r11.18
L379.50
B3144.53
THr54.10

NPS 6

NPS6
O381.00
T55.63
R215.90
X234.95
No. × hole Ø (mm)12 × Ø31.75
Bolt circle Ø (mm)317.50
L2139.70
H168.40
B2--
L85.85
B170.69
r12.70
L385.85
B3171.45
THr57.15

NPS 8

NPS8
O469.90
T63.50
R270.00
X298.45
No. × hole Ø (mm)12 × Ø38.10
Bolt circle Ø (mm)393.70
L2162.05
H219.20
B2--
L101.60
B221.49
r12.70
L3114.30
B3222.25
THr63.50

NPS 10

NPS10
O546.10
T69.85
R323.85
X368.30
No. × hole Ø (mm)16 × Ø38.10
Bolt circle Ø (mm)469.90
L2184.15
H273.05
B2--
L107.95
B276.35
r12.70
L3127.00
B3277.37
THr71.37

NPS 12

NPS12
O609.60
T79.50
R381.00
X419.10
No. × hole Ø (mm)20 × Ø38.10
Bolt circle Ø (mm)533.40
L2200.15
H323.85
B2--
L117.60
B327.15
r12.70
L3143.00
B3328.17
THr76.20

NPS 14

NPS14
O641.35
T85.85
R412.75
X450.85
No. × hole Ø (mm)20 × Ø41.40
Bolt circle Ø (mm)558.80
L2212.85
H355.60
B2--
L130.30
B359.16
r12.70
L3155.70
B3360.17
THr82.55

NPS 16

NPS16
O704.85
T88.90
R469.90
X508.00
No. × hole Ø (mm)20 × Ø44.45
Bolt circle Ø (mm)615.95
L2215.90
H406.40
B2--
L133.35
B410.46
r12.70
L3165.10
B3411.23
THr85.85

NPS 18

NPS18
O787.40
T101.60
R533.40
X565.15
No. × hole Ø (mm)20 × Ø50.80
Bolt circle Ø (mm)685.80
L2228.60
H457.20
B2--
L152.40
B461.77
r12.70
L3190.50
B3462.28
THr88.90

NPS 20

NPS20
O857.25
T107.95
R584.20
X622.30
No. × hole Ø (mm)20 × Ø54.10
Bolt circle Ø (mm)749.30
L2247.65
H508.00
B2--
L158.75
B513.08
r12.70
L3209.55
B3514.35
THr92.20

NPS 24

NPS24
O1041.40
T139.70
R692.15
X749.30
No. × hole Ø (mm)20 × Ø66.80
Bolt circle Ø (mm)901.70
L2292.10
H609.60
B2--
L203.20
B615.95
r12.70
L3266.70
B3615.95
THr101.60
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Catalogue dimensions converted using 1 inch = 25.4 mm, rounded to two decimal places. NPS retains its nominal inch designation. Dimension letters correspond to the drawing. Unspecified values remain blank. NPS 1/2 to 2-1/2 use Class 1500 dimensions, as stated in the original document.

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Burgos motorway, exit 36

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