Types of Pipe Coupling

Types of Pipe Coupling

Socket Weld Sockets and Threaded Coupling as per ANSI/ ASME B16.11

  • DIN EN 10241:2000 (old DIN 2986)
  • ASME B16.11 / BS 3799
  • MSS SP-83
  • EN 13480-3
  • GB/T14626
  • ASTM A182
  • ASME/ANSI B1.20.1

Table of Contents

ASME B16.11 Coupling Specification

Size Range
  • 1/8”- 12” in Class 3000
  • 1/8”- 8” in Class 6000
  • 1/8 – 8” in Class 150
  • 1/8”- 4” in Class 9000
Wall Thickness
  • SCH 10
  • SCH 80
  • SCH 160
  • SCH XXS
Pressure Rating
  • 1000 PSI
  • 2000 PSI
  • 3000 PSI
  • 6000 PSI
  • 9000 PSI
End Connection
  • Socket Weld End : Class 3000/ 6000/ 9000
  • Threaded End : Class 2000/ 3000 / 6000
Threads Types
  • NPTF
  • BSPP
  • BSP
  • BSPT
  • SAE
  • NPT
PN Pressure Class
  • PN 10
  • PN 20
  • PN 100/ 50
Types Of Socket Weld Coupling
  • Full Coupling
  • Half Coupling
  • Reducing Coupling
Types Of Threaded Coupling
  • Full Coupling
  • Half Coupling
  • Reducing Coupling
  • Female Threaded Coupling
  • Screwed Coupling
  • One Side Threaded coupling
  • NPT Coupling
  • BSP Coupling
  • Threaded Straight Coupling
  • Threaded Union Coupling
Types of Forging
  • CNC Machined
  • Forged
Standards
  • ANSI/ ASME B16.11
  • DIN EN 10241:2000
  • BS 3799
  • MSS SP-83
  • ASTM A182
Surface Treatment
  • Galvanized
  • Polished
  • Anti-rust Oil
  • Zinc Plated
SS Thread Standard
  • DIN EN 10226
  • DIN EN ISO 228-1
Stainless Steel Coupling End Type
  • PBE: Plain Both Ends
  • POE: Plain One End
  • TBE: Thread Both Ends
  • TE: Thread End

Types of Threaded Couplings

Threaded Full Coupling

Threaded Full Coupling

Threaded Half Coupling

Threaded Half Coupling

Threaded Reducing Coupling

Threaded Reducing Coupling

Female Threaded Coupling

Female Threaded Coupling

Threaded Screwed Coupling

Threaded Screwed Coupling

One Side Threaded Coupling

One Side Threaded Coupling

NPT Threaded Coupling

NPT Threaded Coupling

BSP Threaded Coupling

BSP Threaded Coupling

Threaded Straight Coupling

Threaded Straight Coupling

Types of Socket Weld Couplings

Socket Weld Full Coupling

Socket Weld Full Coupling

Socket Weld Half Coupling

Socket Weld Half Coupling

Socket Weld Reducing Coupling

Socket Weld Reducing Coupling

Sockets Special Versions

Threaded Fittings PN 10 (ECO – Line) Sockets Special Versions Thick Walled Coupling Thick Walled Coupling
Hexagoan Coupling Hexagoan Coupling
Welded Coupling Welded Coupling
PN 16/20 ( ISO 4144 ) Orbital Coupling Orbital Coupling
Special Length in Coupling Special Length in Coupling
PN 50/100 Casted Coupling Casted Coupling
Reducing Sockets Reducing Sockets

SS Full Socket Dimensions

SS Full Socket Dimensions

PN Rp D L kg
40 1/8″ 14,0 17 0,011
40 1/4″ 18,5 25 0,028
40 3/8″ 21,5 26 0,034
40 1/2″ 26,5 34 0,067
40 3/4″ 31,8 36 0,080
40 1″ 39,5 43 0,140
20 1 1/4″ 48,3 48 0,200
20 1 1/2″ 54,5 48 0,240
20 2″ 66,3 56 0,350
16 2 1/2″ 82,0 65 0,510
16 3″ 95,0 71 0,700
16 4″ 122,0 83 1,280

Stainless Steel Half Welding Socket Dimensions

Stainless Steel Half Welding Socket Dimensions

G s d T D L kg
1/2″ 2,0 22,5 3 26,5 15,0 0,026
1/4″ 2,0 14,5 3 18,5 11,0 0,013
3/4″ 2,0 28,0 3 32,0 17,0 0,032
3/8″ 2,0 17,5 3 21,5 12,0 0,015
1″ 2,0 35,5 3 39,5 19,5 0,058
1 1/4″ 2,0 44,3 3 48,3 22,0 0,077
1 1/2″ 2,0 50,5 3 54,5 22,0 0,102
2″ 2,0 62,3 3 66,3 26,0 0,160

Thread Types of Pipe Coupling

Abbreviation System Name
BSPP British Standard Pipe Parellel
BSPT British Standard Pipe Taper
NPT American Standard Taper Pipe Thread
NHT or NST American Standard Fire Hose Coupling Thread
NPTF American Standard Taper Pipe Fuel Dryseal Thread
NPSH American Standard Straight Pipe for Hose Couplings
IPT Iron Pipe Thread
NPSM American Standard Straight Mechanical Joints
CHT American Standard Fire Hose Thread
GHT Garden Hose Thread
IPS Iron Pipe Straight Thread
JIC Joint Industrial Committee

Various Types of Pipe Coupling

  • Full Coupling
  • Half Coupling
  • Compression Coupling
  • Slip Coupling
  • Reducer Coupling
  • Permanent Coupling
  • Removable Pipe Coupling

Materials Used in Pipe Coupling?

  • Stainless Steel
  • Copper
  • Brass
  • Bronze
  • Aluminum
  • PVC

PN 100/ 50 High Pressure Half and Full Coupling as per EN 13480-3

Threaded Fittings
PN 10 Coupling (ECO – Line) PN 16/20 Coupling ( ISO 4144 ) PN 50/100 Coupling
Full Coupling Half Coupling Full Coupling Half Coupling Full Coupling Full Coupling
DIN EN 10241
  • Seamless Coupling
  • Welding Coupling
 DIN EN 10241
  • Seamless Coupling
  • Welding Coupling
 DIN EN 10241 –

Which Pipe Materials are you Connecting?

Pipe Materials Type Coupling
Connect Metal Pipe + Metal Pipe GRIP Type Axial Restraint Coupling
FLEX Type Non-Axial Restraint Coupling
Connect Metal Pipe + Plastic Pipe COMBI GRIP Type Axial Restraint Coupling
FLEX Type Non-Axial Restraint Coupling
Connect Plastic Pipe + Plastic Pipe PLAST GRIP Type Axial Restraint Coupling
FLEX Type Non-Axial Restraint Coupling

How to Select the Right Pipe Coupling?

  • Determine the Application
  • Identify the Pipe Material(s)
  • Find out the Correct Size
  • Choose the Best Coupling Material(s)

Stainless Steel Thread Types

Stainless Steel Thread Types DIN /ISO 228 –
Metric Thread DIN 13 –
NPT
  • Half Coupling
  • Full Coupling
  • 3000 LBS Coupling
  • Reduced Coupling

Selection of Pipe Coupling

Selection of Pipe Coupling

 

Threaded Pipe Coupling as per ASME/ANSI B1.20.1 for Pressure Vessel
  • Industrial Applications
  • Plumbing and Residential Use
  • Construction and Infrastructure
  • Power Generation Facilities
  • Fire Protection Systems
  • Marine and Offshore Applications
  • Automotive and Transportation
  • Specialized Applications

Socket-Weld & Threaded Couplings End Finishes

Standard Finish
ASME B16.11 Face to Face
ASME B16.11 Socket Weld
ASME B1.20.1 Screwed Ends (NPT)

Designs on Couplings

Designs on Couplings

How to Evaluate the Couplings?

  • Design Adaptability
  • Axial Freedom
  • Chemical Resistance
  • Ease of Installation
  • Field Repairable
  • Inherent Balance
  • Temperature Sensitivity
  • Alignment Capabilities
  • Backlash
  • Damping Capacity
  • Fail Safe or Fusible Link
  • High Speed Capacity
  • Maintenance Required
  • Torsional Stiffness

Stainless Steel Coupling in ASTM A182 (Forged) and CF8M (Cast) Material
Materials ASTM Standards Grades
Stainless Steel Coupling ASTM A182 F304, F304H, F304L, F306, F309S, F309H, F310S, F310H, F316TI, F316L, F316H, F316LN, F317, F317L, F321, F321H, F347, F347H, F904L , F11, F22, F91
ASTM A312/A403 TP316, TP316L, TP304, TP304L
Carbon Steel Coupling ASTM A105 –
ASTM A350 LF 2
ASTM A53 GR. A & B
ASTM A106 GR. A, B & C, API 5L GR. B, API 5L X 42, X60, X65 & X 70, X46, X52
ASTM A691 GR A, B & C
Duplex & Super Duplex Steel Coupling ASTM A182 F 51, F53, F55 S32750, S31803, S32550, S32205,S32760, S32950
Alloy Steel Coupling ASTM A182 –
ASTM A335 –
ASTM A234 GR P1, P11, P12, P5, P22, P23, P9, P91
ASTM A691 GR 1 CR, 2 1/4 CR, 5 CR, 9CR, 91, 1 1/4 CR
Nickel Alloy Coupling ASTM / ASME SB 336 –
ASTM / ASME SB 564 / 160 / 163 / 472 NICKEL 200 , NICKEL 201, ALLOY 20 / 20 CB 3, INCONEL 825,INCONEL 600, INCONEL 601, INCONEL 625 , MONEL 400, HASTELLOY C 276
Copper Alloy Steel Coupling ASTM / ASME SB 111 UNS NO. C10100 , C10300 , C12000, C10800 , C10200 , C12200, C70600, C71500
ASTM / ASME SB 466 UNS NO. C 71500 ( CU -NI- 70/30), C 70600 ( CU -NI- 90/10)

Pressure Rating of Threaded Coupling

Types of Fiitings Class Designation of Fittings Pipe used for Rating Basis
SCH No. Wall Designation
Threaded 2000 80 XS
3000 160 –
6000 – XSS

Pressure Rating of Socket Weld Coupling

Types of Fiitings Class Designation of Fittings Pipe used for Rating Basis
SCH No. Wall Designation
Socket-welding 3000 80 XS
6000 160 –
9000 – XSS

Pipe Coupling Class Designation

Description Threaded Socket Welding
Class Designation Class Designation
2000 3000 6000 3000 6000 9000
Coupling, Half-coupling l/8-4 l/8-4 l/8-4 l/8-4 l/8-2 1/2-2
1/8-4 1/8-4 1/8-4 l/8-4 1/8-2 1/2-2
1/8-4 1/8-4 1/8-4 1/8-2 1/2-2
  l/8-4 l/8-4 l/8-4 l/8-2 1/2-2

Threaded Coupling Weight in Kg

NPS Threaded Coupling Weight in Kg
Coupling Half-coupling
3000 6000 3000 6000
3/8 0.06 0.18 0.03 0.09
1/2 0.14 0.32 0.07 0.16
3/4 0.21 0.45 0.10 0.22
1 0.41 0.90 0.21 0.44
1 1/4 0.72 1.10 0.36 0.52
1 1/2 1.06 1.85 0.52 0.95
2 1.40 2.80 0.69 1.40
2 1/2 2.50 4.10 1.15 2.00
3 3.70 6.40 1.60 3.00
4 6.50 10.70 3.20 5.20

Socket Weld Coupling Weight in Kg

NPS Socket Weld Coupling Weight in Kg
Coupling Half-coupling
3000 6000 9000 3000 6000 9000
1/2 0.09 0.13 0.19 0.09 0.13 0.19
3/4 0.14 0.21 0.31 0.14 0.21 0.31
3/8 0.05 0.08 – 0.05 0.08 –
1 0.22 0.34 0.51 0.22 0.34 0.51
1 1/2 0.57 0.86 1.29 0.57 0.86 1.29
1 1/4 0.36 0.54 0.81 0.36 0.54 0.81
2 0.92 1.38 2.07 0.92 1.38 2.07

Salient Features of Couplings

  • Available in several finishes
  • Usually long life
  • Low lateral stiffness
  • Mostly cylindrical in design
  • Easy mounting and dismounting
  • Operate in quiet and smooth way

Stainless Steel Coupling DN Size Range

Description Threaded Socket-Weld
Class Designation Class Designation
2000 3000 6000 3000 8000 9000
Coupling, Half-Coupling DN6-DN100 DN6-0N100 DN6-0N100 DN6-DN100 DN6-0N50 DN15-DN50
DN6-0N100

Dimensions & Masses of ASME B16.11 SW Couplings

Dimensions & Masses of ASME B16.11 SW Couplings
Dimensions & Masses of ASME B16.11 SW Couplings
Dimensions & Masses of ASME B16.11 SW Couplings
Dimensions & Masses of ASME B16.11 SW Couplings
Dimensions & Masses of ASME B16.11 SW Couplings

ASME B16.11 Threaded Couplings Dimensions & Masses

ASME B16.11 Threaded Couplings Dimensions & Masses
ASME B16.11 Threaded Couplings Dimensions & Masses
ASME B16.11 Threaded Couplings Dimensions & Masses
ASME B16.11 Threaded Couplings Dimensions & Masses