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Instrumentation

Pipe Fittings

Pipe Fittings ∙

Thread Information

Thread Information Threads of many different kinds are used for different purposes in small piping components. The followings are the most common types of pipe threads.

1. NPT Tapered Pipe Threads

∙60。Thread Angle ∙Taper Angle 1。47’ ∙Truncation of root and crest are flat. ∙Pitch measured in inches.

NPT(National Pipe Tapered) is made to specifications outlined in ANSI B1. 2. This is the pipe thread used on the pipe end.

2. ISO 7/1 Tapered Pipe Threads

∙55�Thread Angle ∙Taper Angle 1�47′ ∙Truncation of root and crest are round. ∙Pitch measured in millimeters.

International Organization For Standards(ISO 7/1) Tapered.(P.T) ISO tapered threds are equivalent to DIN 2999. BSP TR, JIS B0203, R 1/8 and R 1/4 Keg. In application ISO threads are used similar to NPT threads. However, care should be used that ISO and NPT threads are not mixed. ISO threads have a 55。angle versus 60。 for NPT. Thread pitch is usually measured in millimeters but may be expressed in inch. In many sizes the threads-per-inch are different and the root and crest configurations are different from NPT.

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UNION METAL INDUSTRIAL CO., LTD.

3. ISO 228/1 Parallel Pipe Threads

∙55� Thread Angle ∙Diameter measured in inches. ∙Truncation of root and crest are round. ∙Pitch measured in inches.

International Organization For Standards(ISO 228/1) paralle(PF) ISO Parallel threads are equivalent to DIN ISO 228/1, BSP PL, JIS B0202, R 1/8 and R 1/4. These pipe threads are similar in configuration to 7/1 threads except there is no taper. Therefore do not work by thread interference like the tapered pipe threads of ISO 7/1 or NPT. A gasket or O-Ring is normaly used to seal into the parallel female threaded component.

Comparison Chart Pipe Threads Included Nominal Threads Thread Angle Size Per inch 1/16” NPT 27 60。 ISO 28 55。 1/8” NPT 27 60。 ISO 28 55。 1/4” NPT 18 60。 ISO 19 55。 3/8” NPT 18 60。 ISO 19 55。 1/2” NPT 14 60。 ISO 19 55。 3/4” NPT 14 60。 ISO 14 55。 1” NPT 11-1/2 60。 ISO 11 55。 1-1/4” NPT 11-1/2 60。 ISO 11 55。 1” NPT 11-1/2 60。 ISO 11 55。 1-1/4” NPT 11-1/2 60。 ISO 11 55。

Pitch

.037” .036” .037” .036” .0556” .053” .0556” .053” .0714” .071” .0714” .071” .087” .091” .087” .091” .087” .091” .087” .091”

Pipe O.D.

.312” .312” .405” .398” .540” .535” .675” .672” .840” .843” 1.050” 1.060” 1.315” 1.331” 1.660” 1.669” 1.315” 1.331” 1.660” 1.669”

Pipe Fittings ∙

Pressure Ratings/How to Order

Pressure Ratings(psi) NPT or PT(ISO 7/1) Size

Male

Female

Male

1/8” 1/4” 3/8” 1/2” 3/4” 1”

9400 7500 7300 7200 6800 5000

6100 6200 5000 4800 4300 4100

5000 4000 3900 3800 3600 2600

316SS

Brass Female

3200 3300 2600 2400 2300 2200

Working pressures calcurated in accordance with Power Piping Code ANSI B 31.1

How to Order

P Pipe Fittings

HRN -

08 - 04 N - SS Pipe Size (1/2”)

Fittings Type Hex Reducing Nipple

Pipe Size Thread Type (NPT) (1/4”)

SS = 316 Stainless Steel BS = Brass CS = Carbon Steel MO = Monel I N = Inconel

Thread Designations

Pipe Thread Designations Nom. Size

1/8

1/4 3/8

1/2

3/4

1

Designation

02

04

08

12

16

06

Materials

N : American National Standard Taper Pipe Threads(NPT : ANSI B1.20.1) R : Taper Pipe Threads(PT : JIS BO203, ISO 7/1)

UNION METAL INDUSTRIAL CO., LTD.

3

Pipe Fittings ∙

INDEX

INDEX Male Pipe to Male Pipe PART

ITEM

Close Nipple

Female Pipe to Female Pipe Page

5

PCN Hex Nipple

5

PHN Hex Long Nipple

5

PHLN Hex Reducing Nipple

6

PHRN Long Nipple

6

PLN Male Elbow

7

PME

7

PMT

ITEM

Reducing Coupling

9

PRC Female Elbow

9

PFE Female Tee

9

PFT Union Ball Joints

9

PBJ Female Pipe to Welded Systems ITEM

Coupling S.W Type

Adapter

PA Reducing Adapter

PRA Reducing Bushing

PRB Street Elbow

PSE Street Tee

PST Branch Tee

PBT

UNION METAL INDUSTRIAL CO., LTD.

10

PRCW Special Coupling

7

PSC

7

Components PART

8

Pipe Cap

PCP 8

Pipe Plug

PPG 8 8

Page

10

Reducing Coupling S.W Type

Page

Page

9

PC

PCW

Female Pipe to Male Pipe

4

ITEM

Coupling

PART

Male Tee

PART

PART

10

ITEM

Page

10 10

Pipe Fittings ∙ PCN/PHN/PHLN Close Nipple

PCN

Hex Nipple

PHN

Hex Long Nipple

PHLN

Connects Female Pipe To Female Pipe Part No.

Pipe Size

Dimensions

PT,NPT

A

E

PCN-02

1/8

19.1

4.8

PCN-04

1/4

28.4

7.0

PCN-06

3/8

28.4

10.0

PCN-08

1/2

38.1

12.0

PCN-12

3/4

38.1

16.0

PCN-16

1

47.8

22.0

Connects Female Pipe To Female Pipe Part No.

Dimensions

Pipe Size PT,NPT

A

E

F

PHN-02

1/8

25

4.8

7/16

PHN-04

1/4

35

7.0

9/16

PHN-06

3/8

36

10.0

11/16

PHN-08

1/2

47

12.0

7/8

PHN-12

3/4

47

16.0

1-1/16

PHN-16

1

59

22.0

1-3/8

Connects Female Pipe To Female Pipe Part No. PHLN-02-1.5 PHLN-02-2.0 PHLN-02-2.5 PHLN-02-3.0 PHLN-02-4.0 PHLN-04-1.5 PHLN-04-2.0 PHLN-04-2.5 PHLN-04-3.0 PHLN-04-4.0 PHLN-04-6.0 PHLN-06-2.0 PHLN-06-3.0 PHLN-06-4.0 PHLN-08-2.0 PHLN-08-3.0 PHLN-08-4.0 PHLN-08-6.0 PHLN-12-3.0 PHLN-12-4.0 PHLN-16-3.0 PHLN-16-4.0

Dimensions

Pipe Size PT,NPT

1/8

1/4

3/8

1/2

3/4 1

A 40 50 65 75 100 40 50 65 75 100 150 50 75 100 50 75 100 150 75 100 75 100

E

F

4.8

7/16

7.0

9/16

10.0

11/16

12.0

7/8

16.0

1-1/16

22.0

1-3/8

Note : Dimensions are reference only, subject to change without prior notice.

UNION METAL INDUSTRIAL CO., LTD.

5

Pipe Fittings ∙

PHRN/PLN

Hex Reducing Nipple

PHRN

Connects Female Pipe To Female Pipe Part No. PHRN-04-02

Long Nipple

PLN

Pipe Size

Dimensions

P-PT,NPT

P1-PT,NPT

A

E

F

1/4

1/8

31

4.8

9/16

PHRN-06-04

3/8

1/4

36

7.0

11/16

PHRN-08-04

1/2

1/4

42

7.0

7/8

PHRN-08-06

1/2

3/8

42

10.0

7/8

PHRN-12-06

3/4

3/8

44

10.0

1-1/16

PHRN-12-08

3/4

1/2

49

12.0

1-1/16

PHRN-16-08

1

1/2

54

12.0

1-3/8

PHRN-16-12

1

3/4

54

16.0

1-3/8

Connects Female Pipe To Female Pipe Part No. PLN-02-1.5 PLN-02-2.0 PLN-02-2.5 PLN-02-3.0 PLN-02-4.0 PLN-04-1.5 PLN-04-2.0 PLN-04-2.5 PLN-04-3.0 PLN-04-4.0 PLN-04-6.0 PLN-06-2.0 PLN-06-3.0 PLN-06-4.0 PLN-08-2.0 PLN-08-3.0 PLN-08-4.0 PLN-08-6.0 PLN-12-3.0 PLN-12-4.0 PLN-16-3.0 PLN-16-4.0

Dimensions

Pipe Size PT,NPT

1/8

1/4

3/8

1/2

3/4 1

A 40 50 65 75 100 40 50 65 75 100 150 50 75 100 50 75 100 150 75 100 75 100

E

F

5.7

∅ 10.5

7.8

∅ 13.8

10.9

∅ 17.3

14.3

∅ 21.7

19.4

∅ 27.2

25.0

∅ 34.0

Note : Dimensions are reference only, subject to change without prior notice.

6

UNION METAL INDUSTRIAL CO., LTD.

Pipe Fittings ∙

PME/PMT/PA/PRA

Male Elbow

Connects Female Pipe To Female Pipe

PME

A P

E

F

P

Male Tee

PMT

Part No.

PA

PME-02 PME-04 PME-06 PME-08

1/8 1/4 3/8 1/2

PRA

E

F

4.8 7.0 10.0 12.0

7/16 1/2 13/16 13/16

Connects Female Pipe To Female Pipe Part No.

Dimensions

Pipe Size PT,NPT

1/8 1/4 3/8 1/2

A 39.0 53.3 56.0 73.6

E 4.8 7.0 10.0 12.0

L 19.5 21.5 28.0 36.8

F 7/16 9/16 11/16 13/16

Connects Male Pipe To Female Pipe Part No.

Dimensions

Pipe Size PT,NPT

PA-02 PA-04 PA-06 PA-08 PA-12 PA-16

Reducing Adapter

A 19.5 23.4 28.0 36.8

PT,NPT

PMT-02 PMT-04 PMT-06 PMT-08

Adapter

Dimensions

Pipe Size

1/8 1/4 3/8 1/2 3/4 1

A 28 33 36 45 50 58

E

F

4.8 7.0 10.0 12.0 16.0 22.0

9/16 3/4 7/8 1-1/16 1-1/4 1-5/8

Connects Male Pipe To Female Pipe Part No.

Dimensions

Pipe Size

A

E

F

PRA-04-02

1/4

1/8

30

4.8

3/4

PRA-06-04

3/8

1/4

35

7.0

7/8

PRA-08-04

1/2

1/4

39

7.0

1-1/16

PRA-08-06

1/2

3/8

41

10.0

1-1/16

PRA-12-06

3/4

3/8

44

10.0

1-1/4

PRA-12-08

3/4

1/2

48

12.0

1-1/4

PRA-16-08

1

1/2

52

12.0

1-5/8

PRA-16-12

1

3/4

55

16.0

1-5/8

P-PT,NPT P1-PT,NPT

Note : Dimensions are reference only, subject to change without prior notice.

UNION METAL INDUSTRIAL CO., LTD.

7

Pipe Fittings ∙

PRB/PSE/PST/PBT

Reducing Bushing

PRB

Connects Female Pipe To Male Pipe Part No.

Pipe Size P-PT,NPT

PRB-04-02 PRB-06-04 PRB-08-04 PRB-08-06 PRB-12-04 PRB-12-06 PRB-12-08 PRB-16-08 PRB-16-12

Street Elbow

PSE

PST

Part No.

PBT

E

F

1/8 1/4 1/4 3/8 1/4 3/8 1/2 1/2 3/4

22 23 28 28 31 31 31 35 35

8.0 11.0 11.0 15.0 11.0 15.0 18.0 18.0 22.0

9/16 11/16 7/8 7/8 1-1/16 1-1/16 1-1/16 1-3/8 1-3/8

1/4 3/8 1/2 1/2 3/4 3/4 3/4 1 1

Dimensions

Pipe Size P-PT,NPT

A

L

E

F

1/8 1/4 3/8 1/2

26.4 29.7 32.0 39.6

26.4 29.7 36.1 39.6

4.8 7.0 10.0 12.0

1/2 11/16 13/16 1

Connects Male Pipe To Female Pipe Part No. PST-02 PST-04 PST-06 PST-08

Branch Tee

A

Connects Male Pipe To Female Pipe

PSE-02 PSE-04 PSE-06 PSE-08

Street Tee

Dimensions

P1-PT,NPT

Pipe Size

Dimensions

PT,NPT

A

L

S

E

F

1/8 1/4 3/8 1/2

48.5 59.4 68.1 79.2

26.4 29.7 36.1 39.6

22.1 29.7 32.0 39.6

4.8 7.0 10.0 12.0

1/2 11/16 13/16 1

Connects Male Pipe To Female Pipe Part No. PBT-02 PBT-04 PBT-06 PBT-08

Pipe Size PT,NPT

1/8 1/4 3/8 1/2

Dimensions A

L

S

E

F

52.8 59.4 72.1 79.2

26.4 29.7 36.1 39.6

22.1 29.7 32.0 39.6

4.8 7.0 10.0 12.0

1/2 11/16 13/16 1

Note : Dimensions are reference only, subject to change without prior notice.

8

UNION METAL INDUSTRIAL CO., LTD.

Pipe Fittings ∙ Coupling

PC

PC/PRC/PFE/PFT Connects Male Pipe To Male Pipe Part No. PC-02 PC-04 PC-06 PC-08 PC-12 PC-16

Reducing Coupling

PRC

PFE

Part No.

PFT

Part No.

PBJ

A

E

F

21 30 30 40 42 51

8.0 11.0 15.0 18.0 22.0 25.0

9/16 3/4 7/8 1-1/16 1-1/4 1-5/8

Pipe Size P-PT,NPT

Dimensions

P1-PT,NPT

1/4 3/8 1/2 1/2 3/4 3/4 1 1

1/8 1/4 1/4 3/8 3/8 1/2 1/2 3/4

A

E

F

30 30 40 40 42 42 51 51

8.0 11.0 11.0 15.0 15.0 18.0 18.0 22.0

3/4 7/8 1-1/16 1-1/16 1-1/4 1-1/4 1-5/8 1-5/8

Dimensions

Pipe Size

A 26.4 29.7 36.0 39.6

PT,NPT

1/8 1/4 3/8 1/2

E 8.6 11.4 14.9 18.5

F 1/2 11/16 13/16 1

Connects Male Pipe To Male Pipe Part No. PFE-02 PFE-04 PFE-06 PFE-08

Union Ball Joints

1/8 1/4 3/8 1/2 3/4 1

Connects Male Pipe To Male Pipe

PFE-02 PFE-04 PFE-06 PFE-08

Female Tee

PT,NPT

Connects Male Pipe To Male Pipe

PRC-04-02 PRC-06-04 PRC-08-04 PRC-08-06 PRC-12-06 PRC-12-08 PRC-16-08 PRC-16-12

Female Elbow

Dimensions

Pipe Size

Dimensions

Pipe Size P-PT,NPT

1/8 1/4 3/8 1/2

A

L

E

F

52.8 59.4 72.1 79.2

26.4 29.7 36.1 39.6

8.6 11.4 15.0 18.5

1/2 11/16 13/16 1

Connects Male Pipe To Male Pipe Part No. PBJ-02 PBJ-04 PBJ-06 PBJ-08 PBJ-12 PBJ-16

Dimensions

Pipe Size P-PT,NPT

A

E

F

F1

1/8 1/4 3/8 1/2 3/4 1

46.0 59.4 63.5 68.3 79.2 90.4

6.8 9.1 13.2 15.7 22.4 26.2

1-1/8 1-3/8 1-1/2 1-3/4 2-1/8 2-1/2

15/16 1-3/16 1-5/16 1-5/8 1-7/8 2-3/8

Note : Dimensions are reference only, subject to change without prior notice.

UNION METAL INDUSTRIAL CO., LTD.

9

Pipe Fittings ∙

PBJ/PCW/PRCW/PCP/PPG

Coupling S.W Type

PCW

Connects Both Welded Systems Part No. PCW-08 PCW-12 PCW-16

Reducing Coupling S.W Type

PRCW

Pipe Size Nom Size

P-SW

A

E

F

1/2 3/4 1

22.2 27.7 34.5

29.5 35.5 38.7

14.0 19.0 25.0

∅ 32 ∅ 38 ∅ 46

Connects Both Welded Systems Part No.

PSC

P-SW P1-SW

Nom Size

PCP

Part No.

PPG

E

32.5 14.0 35.7 14.0 38.7 19.0

Part No.

P-PT,NPT P1-SW

1/2 3/4 1

1/2 3/4 1

22.2 27.7 34.5

E

F

40 43 50

14.0 19.0 25.0

∅ 38 ∅ 46 ∅ 46

Pipe Size

Dimensions

PT,NPT

A

F

1/8 1/4 3/8 1/2 3/4 1

19 23 23 34 34 41

9/16 3/4 7/8 1-1/16 1-1/4 1-5/8

Part No.

Pipe Size

Dimensions

PT,NPT

A

F

1/8 1/4 3/8 1/2 3/4 1

19 24 25 31 31 38

7/16 9/16 11/16 7/8 1-1/16 1-3/8

Note : Dimensions are reference only, subject to change without prior notice.

UNION METAL INDUSTRIAL CO., LTD.

∅ 38 ∅ 46 ∅ 46

A

Connects Female Pipe

PPG-02 PPG-04 PPG-06 PPG-08 PPG-12 PPG-16

10

F

Dimensions

Pipe Size Nom Size

Connects Male Pipe

PCP-02 PCP-04 PCP-06 PCP-08 PCP-12 PCP-16

Pipe Plug

22.2 22.2 27.7

A

Connects Male Pipe to Welded Systems

PSC-08-08W PSC-12-12W PSC-16-16W

Pipe Cap

Dimensions

Pipe Size

PRCW-12-08 3/4 x 1/2 27.7 PRCW-16-08 1 x 1/2 34.5 PRCW-16-12 1 x 3/4 34.5

Special Coupling

Dimensions

Tube Fittings

Tube Fitting - Large Size

Needle Valves

Ball Valves

Hex Ball Valves

Check Valves

Manifolds Valves

Uni-primet Weld/ Face Seal Fittings

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