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ALFA UK LTDBUTTWELD FITTINGS & FLANGES

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www.alfa-uk.com

ALFA – UK LTD. ALFA-UK is established in early 2000 and is a professional supplier of all kinds of Pipe Fittings and Flanges. With constant technological upgradation and to the fullest customer satis-faction, the company is undoubtedly the brand leader in fittings and Flanges in the oilfield and Construction sectors. We are equipped with the most modern facilities and a highly qualified workforce, enabling us to offer the widest possible range of fittings and flanges. Our product line embodies the highest standards in quality, productivity and dependability. ALFA-UK will make an exceptional effort to achieve continuous improvement in everything we do. We will deliver defect-free products and services on time to our customers. Our foremost objective is to do all of our tasks right the first time in meeting the requirements of the customer. Quality assurance figures at the raw material stage and persists through all depart-ments until it reaches the customer. We strive to maximize return on our resources and assets through careful capital management, well reasoned risk taking and the establishment of long-term goals for constant growth, integrity and honorable behavior are the integral part of our values. We, ALFA-UK, with many years of experience and expertise, utilize original cutting-edge tech-nologies to our advantage in providing quality products that support the basic needs of life. ALFA-UK flanges and fittings are designed and manufactured to withstand some of the world's harshest conditions, which they often need to endure in specialized market sectors such as oil & gas, petrochemicals, power generation and mineral refining. Our regional warehouses can respond quickly to your needs, your problems and your shipment.All our products are exported to most parts of the world, such North and South America, Europe, Russian countries and Middle East.

2

ALFA UK LTDBUTTWELD FITTINGSBUTTWELD FITTINGS

Types and Application of Buttweld Fittings.

Applicable Standards. (ASM / ASTM / MSS)

Elbow 90º Long & Short Radius.

Elbow 45º Long & Short Radius.

Caps

Equal Tee

Reducing Tee

Eccentric Reducers

Concentric Reducers

Technical Specification

Elbow 45º and 90º

Tee and Caps

Reducing Tees and Reducers

Forged Steel Flanges

Types & Rating Standards

ASME / ANSI Flanges

Types of Flanges

Weld Neck Flanges

Slip-On Flanges

Socket Weld Flanges

Screwed / Threaded Flanges

Lap Joint Flanges

Blind Flange

ASME _ANSI B16.5 Specification

Weld Neck Flanges - Class 150lbs

Weld Neck Flanges - Class 300lbs

Slip On Flanges - Class 150 lbs

Slip On Flanges - Class 300 lbs

Blind Flanges - Class 150lbs

Blind Flanges - Class 300lbs

BS 4504 (PN Designated)

Weld Neck Flanges / Slip-on Flanges / Blind Flanges16 Bar

Weld Neck Flanges / Slip-on Flanges / Blind Flanges 25 Bar

CONTENTSA

LFA

- U

KB

UT

TW

ELD

FIT

TIN

GS

ALF

A -

UK

FLA

NG

ES

9

10

10

10

11

11

11

11

12

13

14

15

16

17

18

19

4

4

5

5

5

6

6

6

6

7

7

8

3


Alfa Butt w eld fittings are made of high quality materials through earthing and precision process, conform to ANSI B16.9, ASTM A234, WPB Standards, JIS 2311 and DIN 2605.

Alfa Buttweld fittings have all specification from 1/8” to 36”.

Concentric and Eccentric Reducers, Equal and Reducing Tees, 45° and 90° Elbows, Buttweld Caps and Stub Ends, are all part of the comprehensive range of Buttweld fittings carried by ALFA-UK LTD.

All our Buttweld fittings conform to relevant material and dimensional specifications and can be supplied completewith material certificates.

A pipe fitting is defined as a part used in a piping system, to change direction or function, which is mechanicallyjoined to the system.

TYPES AND APPLICATIONS OF BUTTWELD FITTINGS

A piping system using Buttweld fittings has many inherent advantages over other forms.

Welding a fitting to the pipe means it is permanently leakproof.

The continuous metal structure formed between pipe and fittings adds strength to the system.

Smooth inner surface and gradual directional changes reduce pressure losses and turbulence and

minimise the action of corrosion and erosion.

A welded systems utilises a minimum of space.

ALFA Buttweld fittings are manufactured, as a rule, in accordance with ASME standards B16.9 and B16.28 for

dimensions, shapes and tolerances.

ALFA Buttweld fittings are machined in accordance with ASME B16.25 standards for welding and preparation.

Manufacturing methods, quality and so on are bassed upon ASTM A234, A403 and A420 specifications.

Buttweld fittings conforming to dimensions and dimensional tolerances specified in MSS SP-43 can be manufactured

on application.

Buttweld fittings conforming to MSS SP-75 can be specially manufactured on application.

ALFA has standardized dimensions and dimensional tolerances for Buttweld fittings of 50 inches and larger as no

internationally recognized standards exist.

APPLICABLE STANDARDS

B16.9

B16.28

B16.25

B16.11

B36.10

B36.19

Wrought Steel Buttweld fittings

Wrought Steel Buttweld Short Radius and Returns

Buttweld Ends

Forged Fittings, Socket-Welding and Threaded

Welded and Seamless Wrought Steel Pipe

Stainless Steel Pipe

ASME STADARDS

A234

A403

A420

SP-43

SP-75

Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperatures

Service

Wrought Austenitic Stainless Steel Piping Fittings

Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service

Wrought Stainless Steel Buttweld Fittings

High Test Wrought Buttweld Fittings

ASTM STANDARDS

MSS STANDARDS

4


BUTTWELD FITTINGS

900 ELBOWS

LONG RADIUS ELBOW SHORT RADIUS ELBOW EXTRA LONG RADIUS

450 ELBOWS

distance and is equivalent to the radius through which the elbow is bent.

CAPS

IOD D

CTh

C

ODID

Th

C

C

ID

OD

E

The functions of a 900 elbow is to

change direction or flow in a piping

systems.

Elbows are split into three groups which

define the distance over which they

change direction, expressed as a function

of the distance from the centre line of one

end to the opposite face.

This is known as the centre to face

This is where the centre to face dime n -

s ion is longer than t h e standard long

radius type. The most common of these is

where the centre to face dimension is three

times the nominal size. i.e 3D

The function of 450 Elbow is the same as

a 900 Elbow, but the measur- ement of

dimensions , however , is different to that of

the 900 Elbow. The radius of a 450 Elbow is

the same as the radius of the 900 L.R. Elbow

where ‘R’ equals 1½ D. However, the centre to

face dimension is not equivalent to the radius

as in 900 L.R. Elbows, This is measured from

each face to the point of intersection of the

The function of an end cap is to block off

the end of a line in piping systems. This is

achieved by placing the end cap over the

open line and welding around the joint.

In this case the centre to face dimen-

sion is the same as the nominal pipe

size of the elbow.

The most common is the long radius

(L.R.) elbow where the centre to face

dimension is always 1 1/2 times the

nominal pipe size of the elbow.

centre lines perpendicular to each other. This is due to the smaller degree of bend.

5


EQUAL TEES

REDUCING TEES

CONCENTRIC REDUCERS

ECCENTRIC REDUCERS

ODOD

Th

R R

M

R R

L

L

The function of a Tee is to permit

flow at 900 to the main direction of

flow. The Main flow passes through

the ‘run’ whilst the 900 outlet is known

as the ‘branch’. The equal Tee is manu-

factured with all three outlets

being the same size.

The Reducing Tee is manufactured

with the branch outlet smaller than

the run to obtain the desired flow

and pressure through the system.

The function of both types of reducer

is to reduce the line from a larger to a

smaller pipe size, this obviously

results in an increased flow pressure.

With the Eccentric Reducer the

smaller outlet end is off centre to the

larger end enabling it to line up with

one side of the inlet and not with the

other.

The Concentric Reducer is so

manufactured that both inlet and

outlet ends are on a common centre

line. The Concentric reducer is easier

and less expensive to produce but

does not allow quite the same versa-

tility as the Eccentric Reducer. The

lengths of both types are fixed by

m anufacturing standards.

6


NPT(inch)

DN(mm)

OD C C Th Th450 900 450 900 450 900

CENTRE-TO-END(mm)

CENTRE-TO-END(mm)

STANDARD WEIGHT

APPROXWEIGHT

(kg)

APPROXWEIGHT

(kg)

WALLTHICKNESS

(mm)

EXTRA STRONGOUTSIDEDIAMETERAT BEVEL

(mm)

APPROXWEIGHT

(kg)

APPROXWEIGHT

(kg)

WALLTHICKNESS

(mm)

22½33½4568101214161820222426303642

506580901001251502002503003504004505005506006507509001100

6073891021141411682192733243564064575085596106607629141067

35445157647995127159190222254286318343381406470565660

0.350.751.011.421.913.265.181018273346587089100124165239320

0.680.352.032.83.86.410.42035536691115139177201247331478616

0.470.861.392.142.654.657.515243343597792117133164214318428

0.91.82.73.835.491431506886116147189234273328429635820

5.547.017.628.088.569.5310.9712.712.712.712.712.712.712.712.712.712.712.712.712.7

7695114133152190229305381457533610686762838914991114313721600

3.915.165.495.746.026.557.118.189.279.539.539.539.539.539.539.539.539.539.539.53

Technical Specification- Sizes, Dimensions and Weights

ASTM A 234 WPB ANSI B16.9 ANSI B16.28

NPT(inch)

DN(mm)

TEEOD R M Th E Th E

CAPS CAPS TEE CAPS CAPS

CENTRE-TO-END

RUN(mm)

CENTRE-TO-ENDOUTLET(mm)

STANDARD WEIGHT

WALLTHICKNESS

(mm)

APPROXWEIGHT

(kg)

APPROXWEIGHT

(kg)

NOMINALLENGTH

(mm)

WALLTHICKNESS

(mm)

APPROXWEIGHT

(kg)

APPROXWEIGHT

(kg)

NOMINALLENGTH

(mm)

EXTRA STRONGOUTSIDEDIAMETERAT BEVEL

(mm)

22½33½4568101214161820222426303642

506580901001251502002503003504004505005506006507509001100

6073891021141411682192733243564064575085596106607629141067

64768695105124143178216254279305343381419432495559673762

64768695105124143178216254279305343381419432495559673711

3.915.165.495.746.026.557.118.189.279.539.539.539.539.539.539.539.539.539.539.53

0.91.82.73.44.67.310.7203456.771.5599132.8163.4202259295455653779

38385164647689102127152165178203229254267267267267305

0.270.410.6411.423.35.48.212151925313944506087102

1.32.63.54.56.310.417305074101119161203243281378529743887

38385164647689102127152165178203229254267267267267305

0.360.450.911.31.62.64.26.811.3162025334150586679107134

5.547.017.628.088.569.5310.9712.712.712.712.712.712.712.712.712.712.712.712.712.7

Technical Specification- Sizes, Dimensions and Weights


ALFA - UK LTD. reserves the right to change the contents with out notice

ALFA - UK LTD. reserves the right to change the contents with out notice

7

ALFA UK LTDFLANGESFLANGES

Reducing Tees & Reducers

Technical Specification- Sizes, Dimensions and WeightsREDUCING TEE

RUN

NPS(INCH)

DN(mm)

NPS(INCH)

DN(mm)

RUN(mm)

STANDARD(kg)

EXTRA STRONG(kg)

OUTLET(mm)

NOMINALLENGTH

REDUCERS(mm)

APPROXIMATE WEIGHTSOUTLET orREDUCED END

NOMINAL CENTERTO END OF TEES

ECCENTRIC REDUCER CONCENTRIC REDUCER


2

2½

3

3½

4

5

6

8

10

12

14

16

18

20

22

24

50

65

80

90

100

125

150

200

250

300

350

400

450

500

550

600

¾11¼1½11¼1½211¼1½22½1¼1½22½311½22½33½22½33½422½33½4533½4563456846810681012681012148101214168101214161810121416182010121416

2025324025324050253240506532405065802540506580905065809010050658090100125809010012515080100125150200100150200250150200250300150200250300350200250300350400200250300350400450250300350400450500250300350400

64646464767676768686868686

95959595

105105105105105124124124124124143143143143143143178178178178178216216216216216254254254254279279279279305305305305305343343343343343381381381381381381419419419419419419432432432432

44515760576467706770737683

79838992

86899598102105108111114117121121124127130137152152156162168184184191194203216129229241238248250270264273283295305298308321330330324333346356356368359371381381394406384397406406

76767676898989898989898989102102102102102102102102102102102127127127127127140140140140140140152152152152152178178178178178203203203203330330330330356356356356356381381381381381508508508508508508508508508508508508508508508508

0.910.910.9511.361.451.61.62.272.312.312.362.723.43.43.723.764.315.445.444.264.264.314.356.66.66.66.86.98.99.19.59.89.810.417.217.718.418.620323434363646474759666667688184889599106112117122127133139143149155161166173179187195201205206212217

0.370.40.430.470.640.720.780.8111.11.161.21.21.231.261.281.311.31.331.351.371.41.421.491.521.611.671.741.9422.12.182.32.413.313.473.683.84.155.66.87.79.510.412.613.514.426272729

31323436

36373838

50535657

5860646568697071

1.221.221.271.271.911.952.042.042.722.722.812.953.4

55.15.45.7

5.95.96.26.46.88.18.38.59.110.213.614.114.314.514.715292929303041414344455961636783848688104106111117117136140149153158172175182190196204214217221226237245252255259265

0.40.410.460.540.70.790.921.021.111.181.221.251.321.41.451.521.591.811.861.952.042.12.22.22.42.52.62.833.53.744.355.46.67.37.57.78.49.510.411.312.713.414.515.5161827282834

40434648

51525354

68697275

7678798283858788

R M L TEE REDUCER REDUCERTEE

8


FLANGES

FORGED STEEL FLANGES

Forged flanges

Plate flanges

Forged steel flanges made of carbon steel or stainless steel, the materials conform to the

JIS, ASTMA182, A105, DIN17100 ST-2 and BS standard. Dimension to be in accordance with

JIS ANSI DIN BS standard accordingly

The flanges are suitable for connection of steel pipes conveying mediums such as steam,

oil, air and water. They are widely used in chemical industry and Shipbuilding. And the

flanges are suitable for welding. The flanges mainly include Weld Neck ,Blind, Slip-on,

Lap-Joint, Socket, Reducing and plate type.

TYPES

TYPES

RATING

RATING

STANDARDS MATERIAL

STANDARDS

Weld Neck

Blind

Slip-on

Lap Joint

Screwed

Socket Weld

Slip-on w/o collar

Blind

PN 10 to PN 40 DIN 2576, Din 2527

DIN 2533

BS 10, BS 4504

150lbs to 2500 lbs

PN 10 to PN 40

ANSI B 16.5

DIN 2682,2633,2634

2635,2642,2527,2566

2576,2642,2527,2566

MSS SP 44

ASME B 16.47

BS 4504

ASTMA-105

Sizes 1/2” to 36” NB ( 15 mm to 900 mm MB )

Facing : Raised, Flat, Ring type joint, Male / Female, Tongue / Groove.

A flange is a method of connecting pipes, valves, pumps and other equipment to form a pipework system. It also provides

easy access for cleaning, inspection or modification. Flanges are usually welded or screwed into such systems and then joined

with bolts.

A flange can also be a plate or ring to form a rim at the end of a pipe when fastened to the pipe.

9


ASME/ANSI FLANGES

Standards

Pressure classes range

Sizes range

Materials

Printing

WELD NECK FLANGE

Weld Neck Flange Dimensions :

WELD NECK FLANGE(WN flange)is circumferentially welded into the system at its neck

which means that the integrity of the butt welded area can be easily examined by radiography.

The bores of both pipe and flange match, which reduces turbulence and erosion inside the

pipeline. The weld neck is therefore favoured in critical application.

ANSI B 16.5, ASME B16.47

150lbs to 2,500lbs.

From ½ “to 36”

Carbon steel ,stainless steel and alloy steel. ASTM - A 105.

Carbon steel and alloy steel with yellow print, black print, oil or zinc.

Class 150 lbs, 300 lbs, 400 lbs, 600 lbs, 900 lbs, 1500 lbs, 2500 lbs

Class 150 lbs, 300 lbs, 400 lbs, 600 lbs, 900 lbs, 1500 lbs

SLIP-ON FLANGE

This flange is slipped over the pipe and then fillet welded. Slip-on flange are easy to use

in fabricated applications.

:::::

Standards


Sizes range

Materials

Printing


150lbs to 2,500lbs.

From ½ “to 36”


Carbon steel and alloy steel with yellow print, black print

oil or zinc.

:::::

Slip-On Flange Dimensions :

The Following are the various types of flanges manufactured by ALFA - UK LTD Weld Neck Flange, Slip-On Flange, Socket Weld

Flange, Screwed/Threaded Flange Lap Joint Flange, Blind Flange

Standards


Sizes range

Materials

Printing

This flange is counter bored to accept the pipe before being fillet welded. The bore of the

pipe and flange are both the same therefore giving good flow characteristics.

:

::::

GB9112-9131, SH3406, ANSI B16.5, DIN 25762766

DIN2632-2638

From 150 lbs to 2,500 lbs

DN 10-DN800.

Carbon steel, stainless steel and alloy steel.

Carbon steel and alloy steel with yellow print, black print,

oil or zinc.

SOCKET WELD FLANGE

10

Standards


Sizes range

Materials

Printing


150lbs to 2,500lbs.

From ½ “to 36”


Carbon steel and alloy steel with yellow print, black print

oil or zinc.

:::::


Standards

Nominal Pressure

Nominal Diameter

Materials

Printing

Packing

This flange is referred to as either threaded or screwed. It is used to connect other threaded

components in low pressure, non-critical applications. No welding is required.

:

::::

:

ANSI, AS2129, JIS, DIN, EN-1092-1, BS10

BS4504 etc.

PN0.25-PN42, 150LB-900LB,5K-30K.

DN10A-DN600A, NPS:3/8 “-24”.

Carbon steel, stainless steel and alloy steel.

Carbon steel and alloy steel with yellow print, black print, oil

or zinc.

Plywooden case.

SCREWED / THREADED FLANGE

Standards

Process

Sizes range

Materials

These flange are always used with either a stub end or taft which is buttwelded to the pipe

with the flange loose behind it. This means the stub end or taft always makes the face. The lap

joint is favoured in low pressure applications because it is easily assembled and aligned. To

reduces cost these flanges can be supplied without a hub and/or in treated, coated carbon

steel.

ANSI, MSS, API, AWWA, DIN, JIS, BS AND GB.

free forging, plate cutting.

1/2 “to 64” (and much larger size according

tocustomers demands)

Carbon steel, stainless steel and alloy steel

:::

:

LAP JOINT FLANGE

This flanges is used to blank off pipelines, valves and pumps, it can also be used as an inspec-

tion cover. It is sometimes referred to as a blanking flanges.

Class 150 lbs, 300 lbs, 400 lbs, 600 lbs, 900 lbs, 1500 lbs, 2500 lbs

BLIND FLANGE

Blind Flange Dimensionstin :

11


Pipe Flange Data

Nom

inal

Pip

e S

ize

Hub Data Drilling Data WeightRaisedFace

A B C D E F G H I JOutside

DiameterOverall

DiameterInside

DiameterOverallLength

HubDiameter

FaceDiameter

Bolt HoleDiameterNumber

of Holeskg/

peiceinmm

inmm

inmm

inmm

inmm

inmm

inmm

inmm

inmm

inmm

Diameterat WeldBevel

Diameterof Circleof Holes

FlangeThickness

min

½

¾

1

1¼

1½

2

2½

3

3½

4

5

6

8

10

12

14

16

18

20

24

4

4

4

4

4

4

4

4

8

8

8

8

8

12

12

12

16

16

20

20

0.48

0.71

1.01

1.33

1.72

2.58

4.11

4.92

6.08

6.84

8.56

10.6

17.6

24.0

36.5

48.4

60.6

68.3

84.5

115

0.84021.301.05026.701.31533.401.66042.201.90048.302.37560.302.87573.003.50088.904.000101.64.500114.35.563141.36.625168.38.625219.110.75273.012.75323.814.00355.616.00406.418.00457.220.00508.024.00609.6

3.50088.903.88098.604.250108.04.620117.35.000127.06.000152.47.000177.87.500190.58.500215.99.000228.610.00254.011.00279.413.50342.916.00406.419.00482.621.00533.423.50596.925.00635.027.50698.532.00812.8

0.62015.700.82020.801.05026.701.38035.101.61040.902.07052.602.47062.703.07078.003.55090.204.030102.45.050128.36.070154.27.980202.710.02254.512.00304.8

0.44011.200.50012.700.56014.200.62015.700.69017.500.75019.100.88022.400.94023.900.94023.900.94023.900.94023.901.00025.401.12028.401.19030.201.25031.751.38035.101.44036.601.56039.601.69042.901.88047.80

1.88047.802.06052.302.19055.602.25057.152.44062.002.50063.502.75069.852.75069.852.81071.403.00076.203.50088.903.50088.904.000101.64.000101.64.500114.35.000127.05.000127.05.500139.75.690144.56.000152.4

0.84021.301.05026.701.32033.501.66042.201.90048.302.38060.452.88073.153.50088.904.000101.64.500114.35.560141.26.630168.48.630219.210.75273.012.75323.814.00355.616.00406.418.00457.220.00508.024.00609.6

1.19030.201.50038.101.94049.302.31058.702.56065.003.06077.703.56090.404.250108.04.810122.25.310134.96.440 246.112.00304.814.38365.315.75400.118.00475.219.88505.022.00558.826.12663.4

1.38035.001.69042.902.00050.802.50063.502.88073.153.62091.904.120104.65.000127.05.500139.76.190157.27.310185.78.500215.910.62269.712.75323.815.00381.016.25412.718.50469.921.00533.423.00584.227.25692.1

0.62015.700.62015.700.62015.700.62015.700.62015.700.75019.100.75019.100.75019.100.75019.100.75019.100.88022.400.88022.400.88022.401.00025.401.00025.401.12028.401.12028.401.25031.751.25031.751.38035.10

2.38060.452.75069.853.12079.253.50088.903.88098.604.750120.75.500139.76.000152.47.000177.87.500190.58.500215.99.500241.311.75298.514.25362.017.00431.818.75476.321.25539.822.75577.925.00635.029.50749.3

C

BEF G J A

I 0.06 in(1.6 mm)

Weld Neck Flanges - ANSI B16.5 Class 150lbs

To b

e sp

ecifi

ed b

ypu

rcha

ser

12


Pipe Flange Data

Nom

inal

Pip

e S

ize

Hub Data Drilling Data WeightRaisedFace

A B C D E F G H I JOutside

DiameterOverall

DiameterInside


HubDiameter

FaceDiameter


of Holeskg/

peiceinmm

inmm

inmm

inmm

inmm

inmm

inmm

inmm

inmm

inmm

Diameterat WeldBevel


FlangeThickness

min

½

¾

1

1¼

1½

2

2½

3

3½

4

5

6

8

10

12

14

16

18

20

24

4

4

4

4

4

8

8

8

8

8

8

12

12

16

16

20

20

24

24

24

0.75

1.26

1.52

2.03

2.89

3.40

5.17

6.93

8.67

11.2

15.1

19.1

29.9

42.7

61.8

85.8

106

131

158

230

0.84021.301.05026.701.31533.401.66042.201.90048.302.37560.302.87573.003.50088.904.000101.64.500114.35.563141.36.625168.38.625219.110.75273.012.75323.814.00355.616.00406.418.00457.220.00508.024.00609.6

3.75095.204.620117.34.880123.95.250133.36.120155.46.500165.17.500190.58.250209.59.000228.610.00254.011.00279.412.50317.515.00381.017.50444.520.50520.723.00584.225.50647.728.00711.230.50774.736.0

914.4

0.62015.700.82020.801.05026.701.38035.101.61040.902.07052.602.47062.703.07078.003.55090.204.030102.45.050128.36.070154.27.980202.710.02254.512.00304.8

0.56014.200.62015.700.69017.500.75019.000.81020.600.88022.301.00025.401.12028.401.19030.201.25031.701.38035.001.44036.501.62041.101.88047.702.00050.802.12053.802.25057.152.38060.452.50063.502.75069.85

2.06052.302.25057.152.44062.002.56065.002.69068.302.75069.853.00076.203.12079.253.19081.003.38085.803.88098.503.88098.504.380111.24.620117.35.120130.05.620142.75.750146.06.250158.76.380162.06.620168.1

0.84021.301.05026.701.32033.501.66042.201.90048.302.38060.452.88073.153.50088.904.000101.64.500114.35.560141.26.630168.48.630219.210.75273.012.75323.814.00355.616.00406.418.00457.220.00508.024.00609.6

1.50038.101.88047.702.12053.802.50063.502.75069.853.31084.003.940100.04.620117.35.250133.35.750146.07.000177.88.120206.210.25260.312.62320.514.75374.616.75425.419.00482.621.00533.423.12587.227.62701.5

1.38035.001.69042.902.00050.802.50063.502.88073.153.62091.904.120104.65.000127.05.500139.76.190157.27.310185.78.500215.910.62269.712.75323.815.00381.016.25412.718.50469.921.00533.423.00584.227.25692.1

0.62015.700.75019.000.75019.000.75019.000.88022.300.75019.000.88022.300.88022.300.88022.300.88022.300.88022.300.88022.301.00025.401.12028.401.25031.701.25031.701.38035.001.38035.001.38035.001.62041.10

2.62066.553.25082.503.50088.903.88098.504.500114.35.000127.05.880149.36.620168.17.250184.17.880200.19.250234.910.62269.713.00330.215.25387.317.75450.820.25514.322.50571.524.75628.627.00685.832.00812.8

C

BEF G J A

I 0.06 in(1.6 mm)

Weld Neck Flanges - ANSI B16.5 Class 300lbs

To b

e sp

ecifi

ed b

ypu

rcha

ser

13


Pipe Flange Data

Nom

inal

Pip

e S

ize

Hub Drilling Data WeightRaisedFace

A B C D F G H I JOutside

DiameterOverall

DiameterInside


HubDiameter

FaceDiameter


of Holeskg/

peiceinmm

inmm

inmm

inmm

inmm

inmm

inmm

inmm

inmm


FlangeThickness

min

½

¾

1

1¼

1½

2

2½

3

3½

4

5

6

8

10

12

14

16

18

20

24

4

4

4

4

4

4

4

4

8

8

8

8

8

12

12

12

16

16

20

20

0.39

0.56

0.78

1.03

1.32

2.06

3.28

3.85

4.81

5.30

6.07

7.45

12.1

16.5

26.2

34.6

44.8

48.9

61.9

86.9

0.84021.301.05026.701.31533.401.66042.201.90048.302.37560.302.87573.003.50088.904.000101.64.500114.35.563141.36.625168.38.625219.110.75273.012.75323.814.00355.616.00406.418.00457.220.00508.024.00609.6

3.50088.903.88098.604.250108.04.620117.35.000127.06.000152.47.000177.87.500190.58.500215.99.000228.610.00254.011.00279.413.50342.916.00406.419.00482.621.00533.423.50596.925.00635.027.50698.532.00812.8

0.88022.401.09027.701.36034.501.70043.201.95049.502.44062.002.94074.703.57090.704.070103.44.570116.15.660143.86.720170.78.720221.510.88276.312.88327.114.14359.116.16410.518.18461.820.20513.124.25616.0

0.44011.200.50012.700.56014.200.62015.700.69017.500.75019.100.88022.400.94023.900.94023.900.94023.900.94023.901.00025.401.12028.401.19030.201.25031.751.38035.101.44036.601.56039.601.69042.901.88047.80

0.62015.700.62015.700.69017.500.81020.600.88022.401.00025.401.12028.401.19030.201.25031.751.31033.301.44036.601.56039.601.75044.501.94049.302.19055.602.25057.152.50063.502.69068.302.88073.153.25082.60

1.19030.201.50038.101.94049.302.31058.702.56065.003.06077.703.56090.404.250108.04.810122.25.310134.96.440163.67.560192.09.690246.112.00304.814.38365.315.75400.118.00457.219.88505.022.00558.826.12663.4

1.38035.101.69042.902.00050.802.50063.502.88073.153.62091.904.120104.65.000127.05.500139.76.190157.27.310185.78.500215.910.62269.712.75323.915.00381.016.25412.818.50469.921.00533.423.00584.227.25692.2

0.62015.700.62015.700.62015.700.62015.700.62015.700.75019.100.75019.100.75019.100.75019.100.75019.100.88022.400.88022.400.88022.401.00025.401.00025.401.12028.401.12028.401.25031.751.25031.751.38035.10

2.38060.452.75069.853.12079.253.50088.903.88098.604.750120.75.500139.76.000152.47.000177.87.500190.58.500215.99.500241.311.75298.514.25362.017.00431.818.75476.321.25539.822.75577.925.00635.029.50749.3

Slip On Flanges - ANSI B16.5 Class 150lbs

CD

BF G J A

I 0.06 in(1.6 mm)

14


Pipe Flange Data

Nom

inal

Pip

e S

ize

Hub Drilling Data WeightRaisedFace

A B C D F G H I JOutside

DiameterOverall

DiameterInside


HubDiameter

FaceDiameter


of Holeskg/

pieceinmm

inmm

inmm

inmm

inmm

inmm

inmm

inmm

inmm


FlangeThickness

min

½

¾

1

1¼

1½

2

2½

3

3½

4

5

6

8

10

12

14

16

18

20

24

0.84021.301.05026.701.31533.401.66042.201.90048.302.37560.302.87573.003.50088.904.000101.64.500114.35.563141.36.625168.38.625219.110.75273.012.75323.814.00355.616.00406.418.00457.220.00508.024.00609.6

0.88022.401.09027.701.36034.501.70043.201.95049.502.44062.002.94074.703.57090.704.070103.44.570116.15.660143.86.720170.78.720221.510.88276.312.88327.114.14359.116.16410.518.18461.820.20513.124.25616.0

1.38035.101.69042.902.00050.802.50063.502.88073.153.62091.904.120104.65.000127.05.500139.76.190157.27.310185.78.500215.910.62269.712.75323.915.00381.016.25412.818.50469.921.00533.423.00584.227.25692.2

4

4

4

4

4

8

8

8

8

8

8

12

12

16

16

20

20

24

24

24

0.64

1.12

1.36

1.68

2.49

2.87

4.32

5.85

7.34

9.61

12.3

15.6

24.2

34.1

49.8

69.9

88.1

109

134

201

3.75095.204.620117.34.880123.95.250133.36.120155.46.500165.17.500190.58.250209.59.000228.610.00254.011.00279.412.50317.515.00381.017.50444.520.50520.723.00584.225.50647.728.00711.230.50774.736.00914.4

0.56014.200.62015.700.69017.500.75019.000.81020.600.88022.301.00025.401.12028.401.19030.201.25031.701.38035.001.44036.501.62041.101.88047.702.00050.802.12053.802.25057.152.38060.452.50063.502.75069.85

0.88022.401.00025.401.06026.901.06026.901.19030.201.31033.201.50038.101.69042.901.75044.401.88047.702.00050.802.06052.302.44061.902.62066.552.880.73.153.00076.203.25082.503.50088.903.75095.204.190106.4

1.50038.101.88047.702.12053.802.50063.502.75069.853.31084.003.940100.04.620117.35.250133.35.750146.07.000177.88.120206.210.25260.312.62320.514.75374.616.75425.419.00482.621.00533.423.12587.227.62701.5

0.62015.700.75019.100.75019.100.75019.100.88022.400.75019.100.88022.400.88022.400.88022.400.88022.400.88022.400.88022.401.00025.401.12028.401.25031.701.25031.701.38035.001.38035.001.38035.001.62041.00

2.62066.553.25082.503.50088.903.88098.604.500114.35.000127.05.880149.46.620168.17.250184.27.880200.19.250234.910.62269.713.00330.215.25387.317.75450.820.25514.422.50571.524.75628.727.00685.832.00812.8

Slip On Flanges - ANSI B16.5 Class 300lbs

CD

BF G J A

I 0.06 in(1.6 mm)

15


Blind Flanges - ANSI B16.5 Class 150lbs

C

G J A

I 0.06 in(1.6 mm)

Pipe Flange Data

Nom

inal

Pip

e S

ize

Drilling Data WeightRaisedFace

A C G H I JNumberof Holes

kg/peice

FaceDiameter

inmm

Bolt HoleDiameter

inmm

OverallDiameter

inmm

OutsideDiameter

inmm

inmm


inmm

FlangeThickness

min

½

¾

1

1¼

1½

2

2½

3

3½

4

5

6

8

10

12

14

16

18

20

24

4

4

4

4

4

4

4

4

8

8

8

8

8

12

12

12

16

16

20

20

0.42

0.61

0.86

1.17

1.53

2.42

3.94

4.93

6.17

7.00

8.63

11.3

19.6

28.8

43.2

58.1

76.0

93.7

122

185

0.84021.301.05026.701.31533.401.66042.201.90048.302.37560.302.87573.003.50088.904.000101.64.500114.35.563141.36.625168.38.625219.110.75273.012.75323.814.00355.616.00406.418.00457.220.00508.024.00609.6

3.50088.903.88098.604.250108.04.620117.35.000127.06.000152.47.000177.87.500190.58.500215.99.000228.610.00254.011.00279.413.50342.916.00406.419.00482.621.00533.423.50596.925.00635.027.50698.532.00812.8

0.44011.200.50012.700.56014.200.62015.700.69017.500.75019.100.88022.400.94023.900.94023.900.94023.900.94023.901.00025.401.12028.401.19030.201.25031.751.38035.101.44036.601.56039.601.69042.901.88047.80

1.38035.101.69042.902.00050.802.50063.502.88073.153.62091.904.120104.65.000127.05.500139.76.190157.27.310185.78.500215.910.62269.712.75323.915.00381.016.25412.818.50469.921.00533.423.00584.227.25692.2

0.62015.700.62015.700.62015.700.62015.700.62015.700.75019.100.75019.100.75019.100.75019.100.75019.100.88022.400.88022.400.88022.401.00025.401.00025.401.12028.401.12028.401.25031.751.25031.751.38035.10

2.38060.452.75069.853.12079.253.50088.903.88098.604.750120.75.500139.76.000152.47.000177.87.500190.58.500215.99.500241.311.75298.514.25362.017.00431.818.75476.321.25539.822.75577.925.00635.029.50749.3

16


Blind Flanges - ANSI B16.5 Class 300lbs

Pipe Flange Data

Nom

inal

Pip

e S

ize

Drilling Data WeightRaisedFace

A C G H I JNumberof Holes

kg/peice

FaceDiameter

inmm

Bolt HoleDiameter

inmm

OverallDiameter

inmm

OutsideDiameter

inmm

inmm


inmm

FlangeThickness

min

½

¾

1

1¼

1½

2

2½

3

3½

4

5

6

8

10

12

14

16

18

20

24

0.84021.301.05026.701.31533.401.66042.201.90048.302.37560.302.87573.003.50088.904.000101.64.500114.35.563141.36.625168.38.625219.110.75273.012.75323.814.00355.616.00406.418.00457.220.00508.024.00609.6

1.38035.101.69042.902.00050.802.50063.502.88073.153.62091.904.120104.65.000127.05.500139.76.190157.27.310185.78.500215.910.62269.712.75323.915.00381.016.25412.818.50469.921.00533.423.00584.227.25692.2

4

4

4

4

4

8

8

8

8

8

8

12

12

16

16

20

20

24

24

24

0.64

1.11

1.39

1.79

2.66

3.18

4.85

6.81

8.71

11.5

15.6

20.9

34.3

53.3

78.8

105

137

175

221

339

3.75095.204.620117.34.880123.95.250133.36.120155.46.500165.17.500190.58.250209.59.000228.610.00254.011.00279.412.50317.515.00381.017.50444.520.50520.723.00584.225.50647.728.00711.230.50774.736.0

914.4

0.56014.200.62015.700.69017.500.75019.000.81020.600.88022.301.00025.401.12028.401.19030.201.25031.701.38035.001.44036.501.62041.101.88047.702.00050.802.12053.802.25057.152.38060.452.50063.502.75069.85

0.62015.700.75019.000.75019.000.75019.000.88022.300.75019.000.88022.300.88022.300.88022.300.88022.300.88022.300.88022.301.00025.401.12028.401.25031.701.25031.701.38035.001.38035.001.38035.001.62041.10

2.62066.553.25082.503.50088.903.88098.504.500114.35.000127.05.880149.36.620168.17.250184.17.880200.19.250234.910.62269.713.00330.215.25387.317.75450.820.25514.322.50571.524.75628.627.00685.832.00812.8

C

G J A

I 0.06 in(1.6 mm)

17


WELD NECK FLANGESSLIP-ON FLANGES

BLIND FLANGES

16 BARAcc. to BS 4504

NominalBore*

Diameterof

Bolts*

No. ofHoles

ApproximateWeight (Kgs)

DIN2543

DIN2633

OutsideDiameter*

D K

PitchCircle

Diameter*

15

20

25

95

105

115

65

75

85

M12

M12

M12

4

4

4

0.72

1.01

1.23

0.648

0.952

1.14

32

40

50

140

150

165

100

110

125

M16

M16

M16

4

4

4

1.8

2.09

2.88

1.69

1.86

2.53

65

80

100

185

200

220

145

160

180

M16

M16

M16

8

8

8

3.66

4.77

5.65

3.06

3.7

4.62

125

150

200

250

285

340

210

240

295

M16

M20

M20

8

8

12

8.42

10.4

16.1

6.3

7.75

11

250

300

350

405

460

520

355

410

470

M24

M24

M24

12

12

16

24.9

35.1

47.8

15.6

22

31.2

400

450

500

580

640

715

525

585

650

M27

M27

M30

16

20

20

63.5

85

102

39.3

55

61

600

700

800

840

910

1025

770

840

950

M33

M33

M36

20

24

24

900

1000

1125

1255

1050

1170

M36

M39

28

28

Dimensions in mm.

18


WELD NECK FLANGESSLIP-ON FLANGES

BLIND FLANGES

25 BARAcc. to BS 4504

NominalBore*

Diameterof

Bolts*

No. ofHoles

ApproximateWeight (Kgs)

DIN2544

DIN2634

OutsideDiameter*

PitchCircle

Diameter*

15

20

25

95

105

115

65

75

85

M12

M12

M12

4

4

4

0.81

1.24

1.38

0.746

1.06

1.29

32

40

50

140

150

165

100

110

125

M16

M16

M16

4

4

4

2.03

2.35

3.2

1.88

2.34

2.82

65

80

100

185

200

235

145

160

190

M16

M16

M20

8

8

8

4.29

5.88

7.54

3.74

4.75

6.52

125

150

200

270

300

360

220

250

310

M24

M24

M24

8

8

12

10.8

14.5

22.3

9.07

11.8

17

250

300

350

425

485

555

370

430

490

M27

M27

M30

12

16

16

33.5

46.3

68

24.4

31.2

47.2

400

450

500

620

670

730

550

600

660

M33

M33

M33

16

20

20

89.7

115

138

61.7

72

89.6

600

700

800

845

960

1085

770

875

990

M36

M39

M45

20

24

24

104

136

186

900

1000

1185

1320

1090

1210

M45

M52

28

28

236

307

Dimensions in mm.

19

D K

BUTTWELD FITTINGS & FLANGES

ALFA UK LTD

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