Buttweld Fittings

ANSI B16.9, ANSI B16.28, MSS-SP-43, MSS-SP-95, MSS-SP-97

90LR ELBOWS

45SR ELBOWS

180LR ELBOWS

90SR ELBOWS

CONCENTRIC REDUCER

ECCENTRIC REDUCER

WELDING BRANCHES

MSS TYPE A & B STUB ENDS

SWAGED NIPPLES

CAPS

Concentric and eccentric reducers, equal and reducing

tees, 45and 90elbows, buttweld caps and stub ends,
are all part of the comprehensive range of buttweld
fittings carried by Baoji Tianbang Titanium & Nickel Co., Ltd.
All our buttweld fittings conform to relevant material
and dimensional specifications and can be supplied
complete with material certificates.
Buttweld fittings in duplex and other special alloys
are available from stock or other suppliers.
Huai xi Zhao (deputy president)

XIAN KV-METAL CO., LTD.

( ISO - 9001:2008 Certified Company)
Tel:+86 029 88750690
Fax:+86 029 88750691
Mobile: +86 13892473116
MSN:qiaosun1@live.cn
Skype:jobingpeter QQ:70560956
Http://www.kv-metal.com
Email: forklifts@163.com
Address:505B Torch Mansion,No.48 Gaoxin Road,
Gaoxin Zone,Xi'an China
Zip Code: 710075

EQUAL TEE

REDUCING TEE

Buttweld Fittings
Xian KV-Metal Co., Ltd.
Http://www.kv-metal.com
Email:forklifts@163.com
Skype:jobingpeter
MSN:qiaosun1@live.cn
90ELBOWS
A pipe fitting is defined as a part used

The function of a 90elbow is

O/D

in a piping system, to change direction

or function, which is mechanically
joined to the system.

Probably the simplest way to achieve this would be to bend

the pipe in the direction required, but this process will stretch
and thin the outer wall whilst thickening and wrinkling the inner
wall. This results in flow resistance and accelerated wall
erosion.
A second method sometimes used is a mitre joint, where pipes
are cut to the correct angle and welded together to achieve the
desired change. Whilst the cross-sectional area and wall
thickness are maintained, a great deal of efficiency is lost due
to friction and turbulence resulting from the severe changes in
direction. For example, a single-mitre bend offers about six
times the resistance of a swept elbow.
For these reasons swept fittings are preferred on most piping
systems, particularly where internal pressure, flow and
corrosion are of major consideration.
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

fitting 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 system utilises a minimum of space.

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 distance and is equivalent

to the radius through which the elbow is bent.
Long Radius Elbow
The most common is the long radius (L.R.) elbow where the
centre to face dimension is always 1 times the nominal pipe
size of the elbow.
1

Short Radius Elbow

In this case the centre to face dimension is the same as the
nominal pipe size of the elbow.
Extra Long Radius
This is where the centre to face dimension is longer than the
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.
45ELBOWS

45

The function of a 45elbow

is the same as a 90elbow,
O/D

90
A

to change direction or flow in

a piping system.

but the measurement of

dimensions, however, is
different to that of the 90
elbow. The radius of a 45
elbow is the same as the

radius of the 90L.R. elbow

where R equals 1 D.
However, the centre to face
dimension is not equivalent to the radius as in 90L.R. elbows.
This is measured from each face to the point of intersection of
the centre lines perpendicular to each other. This is due to the
smaller degree of bend.
1

EQUAL AND REDUCING CROSSES

ECCENTRIC AND CONCENTRIC REDUCERS

The function of both types of
1

O/D

O/D

O/D

O/D

reducer is to reduce the line

from a larger to a smaller pipe
size, this obviously results in
an increased flow pressure.
H
H
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 versatility as the eccentric reducer. The
lengths of both types are fixed by manufacturing standards.

O/D

M
C

O/D

The function of a 180return

bend is to change direction of
flow through 180and there
K
are two basic types, long
radius and short radius. Both
O/D
types have a centre to centre
O
dimension double the
matching 90elbows. The
primary application for these fittings is in heater coils and heat
exchangers, boilers etc.

O/D

180RETURN BENDS

The function of a cross is similar to that of a tee with the

exception of providing two 90outlets opposite each other.
Equal crosses have all four outlets of equal size. Reducing
crosses have branches that are smaller in size to that of the
run to obtain the desired flow and pressure through the
system.
CAPS
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.

E
or
E1

O/D

LAP JOINT STUB ENDS

O/D

O/D

O/D

The function of a tee is to

permit flow at 90to the main
direction of flow. The main
flow passes through the run
whilst the 90outlet is known
as the branch. The equal
tee is manufactured 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.

A lap joint stub end and its

associated slip-on flange in a
piping system allows quick
disconnection of the
particular section involved.
Stub ends are installed in
ASA H
pairs and mated together
MSS G
with two lap joint flanges.
The surface of the stub end has a phonographic serrated
gasket surface which prevents leakage at the joint.
Using stub ends allows sections of the line to be opened for
cleaning, inspection or quick replacement etc., without the
need to re-weld.
O:D

EQUAL AND REDUCING TEES

There are two basic types of stub end, ANSI types A & B long
barrel, and M.S.S. types short barrel. Under certain design
criteria such as temperature or pressure, etc., it is not
acceptable to have the joint between stub end and pipe in
close proximity with the flange joint, in these applications
ANSI types are used.

Metric
15

90LR ELBOW

45LR ELBOW

160S
XXS
10S
40S
80S
160S
XXS
10S
40S
80S
160S
XXS
10S
40S
80S
160S
XXS
10S
40S
80S
160S
XXS
10S
40S
80S
160S
XXS
10S
40S
80S
160S

A
38.1
38.1
38.1
38.1
38.1
38.1
38.1
38.1
38.1
38.1
38.1
38.1
38.1
38.1
38.1
47.6
47.6
47.6
47.6
47.6
57.2
57.2
57.2
57.2
57.2
76.2
76.2
76.2
76.2
76.2
95.3
95.3
95.3
95.3
95.3
114.3
114.3
114.3
114.3

Wgt
0.06
0.08
0.10
0.12
0.17
0.07
0.09
0.11
0.15
0.20
0.14
0.16
0.20
0.30
0.39
0.23
0.26
0.35
0.45
0.64
0.30
0.40
0.55
0.70
0.90
0.50
0.70
0.95
1.40
1.70
0.85
1.40
1.50
2.30
3.10
1.25
2.50
2.90
4.10

B
15.75
15.75
15.75
15.75
15.75
19.05
19.05
19.05
19.05
19.05
22.2
22.2
22.2
22.2
22.2
25.4
25.4
25.4
25.4
25.4
28.45
28.45
28.45
28.45
28.45
35.05
35.05
35.05
35.05
35.05
44.5
44.5
44.5
44.5
44.5
50.8
50.8
50.8
50.8

XXS
10S

114.3
152.4

5.50
2.10

50.8
63.5

XXS
10S
40S
80S

152.4
190.5
190.5
190.5

12.40
3.65
6.80
9.30

63.5
79.2
79.2
79.2

XXS
10S
40S
80S

190.5
228.6
228.6
228.6

18.50
5.45
11.00
16.80

79.2
95.3
95.3
95.3

XXS

228.6

30.00

95.3

10S

304.8

10.25

127.0

40S
80S

304.8
304.8

22.00
34.80

XXS

304.8

10S
40S

381.0
381.0

80S
160S
XXS
10S
40S
80S

381.0
381.0
381.0
457.2
457.2
457.2

XXS
10S
40S
80S

457.2
533.4
533.4
533.4

10S
40S
80S

3/4*

20*

160S
XXS
10S
40S
80S

1-1/4

1-1/2

25

32

40

50

2-1/2

65

80

100

127

40S
80S
160S

160S
6

150

160S
8

200

160S
10

12

250

300

160S
14

350

160S
XXS

152.4
152.4
152.4

190.5

228.6

304.8

457.2

533.4
533.4

&DIMENSIONS

CAPS

EQUAL TEE

Wgt
0.03
0.04
0.05
0.06
0.08
0.035
0.045
0.055
0.07
0.10
0.07
0.08
0.10
0.15
0.19
0.12
0.13
0.175
0.22
0.32
0.15
0.20
0.275
0.35
0.45
0.25
0.35
0.475
0.70
0.85
0.43
0.70
0.75
1.15
1.55
0.63
1.25
1.45
2.05
2.75
1.10
2.00
3.00
4.95
6.20
1.53
3.40
4.65
7.50
9.25
2.72
5.50
8.40
13.00

C/M
25.4
25.4
25.4
25.4
25.4
28.6
28.6
28.6

Wgt
0.09
0.16
0.25
0.16
0.23
0.11
0.23
0.38

E
25.4
25.4
25.4
25.4
25.4
25.4
25.4
25.4

Wgt
0.04
0.03
0.05
0.06
0.08
0.05
0.06
0.09

28.6
28.6

0.28
0.35

25.4
25.4

0.10
0.12

85.7
85.7
85.7
85.7
85.7
104.8
104.8
104.8
104.8
104.8
123.8
123.8
123.8
123.8
123.8
142.9
142.9
142.9
142.9

1.40
1.90
3.80
5.30
7.10
2.15
4.15
7.65
10.90
13.20
3.50
6.60
13.50
16.20
19.80
4.80
9.80
19.30
25.10

127.0
127.0

15.00
5.15
11.00
17.40

142.9
177.8
177.8
177.8

29.20
8.60
18.00
33.00

88.9
101.6
101.6
101.6

101.6

14.20

59.00

127.0

29.50

177.8

53.00

101.6

12.50

19.50
41.00

158.7
158.7

9.75
20.50

215.9
215.9

14.50
31.00

127.0
127.0

53.90
110.00
100.00
27.25
60.00
80.00

158.7
158.7
158.7
190.5
190.5
190.5

26.95
50.00
55.00
13.63
30.00
40.00

215.9
215.9
215.9
254.0
254.0
254.0

254.0

60.00
98.00
88.60
22.00
44.50
78.00

153.00

127.0
127.0
127.0
152.4
152.4
152.4

13.60
30.20
27.40
6.53
15.00
22.50

133.00
39.95
70.00
94.00

190.5
222.2
222.2
222.2

65.50
19.50
35.00
47.00

254.0
279.4
279.4
279.4

121.00
49.00
102.00
115.00

152.4
165.1
165.1
165.1

33.30
8.20
16.00
27.00

4.00
6.00
9.90

15.00

26.00

61.00

174.00

228.00

63.5
63.5
63.5

79.2

95.3

127.0

190.5

222.2
222.2

30.50

87.00

114.00

38.1
38.1
38.1
38.1
38.1
47.6
47.6
47.6

0.27
0.35
0.50
0.48
0.64
0.45
0.65
0.90

38.1
38.1
38.1
38.1
38.1
38.1
38.1
38.1

0.09
0.10
0.13
0.17
0.22
0.13
0.17
0.19

47.6
47.6

0.94
1.40

38.1
38.1

0.23
0.32

57.2
57.2
63.5
63.5

1.30
1.75
0.90
1.10

38.1
38.1
38.1
38.1

0.30
0.39
0.17
0.27

63.5
63.5
76.2
76.2
76.2
76.2
76.2

2.25
2.85
1.10
1.70
3.00
3.60
4.80

38.1
38.1
38.1
38.1
38.1
38.1
38.1

0.45
0.55
0.25
0.35
0.45
0.60
0.80

57.2
57.2
57.2

63.5

177.8

279.4
279.4

0.65
0.88
1.50

2.15

55.00

202.00

38.1
38.1
38.1

38.1

50.8
50.8
50.8
50.8
50.8
63.5
63.5
63.5
63.5
63.5
76.2
76.2
76.2
76.2
76.2
88.9
88.9
88.9
88.9

152.4

165.1
165.1

90

B
O/D

WT
SCH

WEIGHTS

O/D

NOMINAL SIZE

Inches
1/2

FITTINGS

45

0.14
0.20
0.23

O/D

O/D

BUTTWELD

0.30

0.40
0.71
0.85
1.20
1.60
0.65
1.22
1.60
2.60
3.23
1.02
2.00
2.70
4.30
5.16
1.36
3.23
4.40
6.96

E
or
E
1

O/D

8.40
2.49
5.67
8.35

4.90
9.21

42.20

62.50

Note: Weights and dimensions

listed above are a guide only.
Dimensions in mm. Weights in kg.
*There are 2 possible dimensions
for this size, refer to ANSI B16.9

Weights and dimensions of larger

Buttweld Fittings are available from

Engineers in our company.

Email: forklifts@163.com
Skype: jobingpeter
MSN: qiaosun1@live.cn

BUTTWELD

FITTINGS

WEIGHTS

&DIMENSIONS

10S
40S
80S
160S
XXS
10S
40S

3/4 X 1/2

20 X 15

1 X 1/2

25 X 15

1 X 3/4

25 X 20

80S

160S
XXS
10S
40S
80S

160S
XXS
10S
40S
80S
160S
XXS
10S

1-1/4 X 1

1-1/2 X 1

32 X 25

40 X 25

40S
80S
160S
XXS
10S

40S
80S
160S
XXS
10S

1-1/2 X 1-1/4

2X1

40 X 32

50 X 25

40S
80S

160S
XXS
10S
40S
80S
160S
XXS
10S

2 X 1-1/2

2-1/2 X 1-1/2

50 X 40

65 X 40

40S
80S
160S
XXS
10S

2-1/2 X 2

64 X 50

40S
80S
160S
XXS
10S

40S
80S
160S
XXS
10S

3 X 1-1/2

3X2

80 X 40

80 X 50

40S
80S

160S
XXS
10S
40S
80S
160S
XXS

3 X 2-1/2

80 X 65

38.1
38.1
38.1
38.1
38.1
50.8
50.8
50.8
50.8
50.8
50.8
50.8
50.8
50.8
50.8
50.8
50.8
50.8
50.8
50.8
63.5
63.5
63.5
63.5
63.5
63.5
63.5
63.5
63.5
63.5
76.2
76.2
76.2
76.2
76.2
76.2
76.2
76.2
76.2
76.2
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9
88.9

0.03
0.07
0.10
0.14
0.14
0.07
0.13
0.16
0.25
0.25
0.07
0.13
0.16
0.25
0.25
0.09
0.18
0.22
0.42
0.42
0.14
0.26
0.35
0.66
0.66
0.14
0.26
0.35
0.66
0.66
0.23
0.41
0.57
1.12
1.12
0.23
0.41
0.57
1.12
1.12
0.41
0.77
1.01
2.00
2.00
0.41
0.77
1.01
2.00
2.00
0.50
1.00
1.35
2.73
2.73
0.50
1.00
1.35
2.73
2.73
0.50
1.00
1.35
2.73
2.73

Inches

Metric

OD1 X OD2

OD1 X OD2

4X2

100 X 50

Wgt

101.6

0.82
1.60
2.27
4.52
4.52
0.82
1.60
2.27
4.52
4.52
0.82
1.60
2.27
4.52
4.52
1.35
2.75
3.92
8.00
8.00
2.00
3.95
5.94
11.50
11.50

101.6
101.6
101.6
101.6

4 X 2-1/2

100 X 65

4X3

100 X 80

101.6
101.6
101.6
101.6
101.6
101.6
101.6
101.6
101.6
101.6

5X4

125 X 100

127.0
127.0
127.0
127.0
127.0

6X3

150 X 80

139.7
139.7
139.7
139.7
139.7

6X4

150 X 100

139.7
139.7

139.7
139.7
139.7

8X4

200 X 100

152.4
152.4
152.4
152.4
152.4

8X6

200 X 150

152.4
152.4
152.4
152.4
152.4

10 X 6

250 X 150

10 x 8

12 X 6

12 X 8

250 x 200

300 X 150

300 X 200

5.45

10.70
14.48
33.40
33.40

7.70

203.2
203.2
203.2
203.2

15.00
19.79
53.00
53.00
7.70
15.00
19.79
53.00
53.00
7.70
15.00
19.79
53.00
53.00

203.2
203.2
203.2
203.2

12 X 10

300 X 250

5.45

10.70
14.48
33.40
33.40

203.2

203.2

203.2
203.2
203.2
203.2
203.2

5.94
11.50
11.50
3.27
6.50
9.86
18.55
18.55
3.27
6.50
9.86
18.55
18.55

177.8

177.8

2.00
3.95

177.8

177.8
177.8
177.8
177.8
177.8
177.8
177.8

O/D

OD1 X OD2

Wgt

OD1 X OD2

NOMINAL SIZE

O/D

Metric

O/D

Inches

O/D

SCH

NOMINAL SIZE

CONCENTRIC AND ECCENTRIC REDUCERS

WT

Note: Weights and dimensions

listed above are a guide only.
Dimensions in mm. Weights in kg.
Email: forklifts@163.com
Skype: jobingpeter
MSN: qiaosun1@live.cn
*There are 2 possible dimensions
for this size, refer to ANSI B16.9

Weights and dimensions of larger

Buttweld Fittings are available from

Engineers in our company.