The Asme B16.11 Full Coupling Can Range Up To NPS 48 Depending On The Standards Used And The Diameters, Wall Thicknesses And The Pressure Requirements Of The Application. The Threaded Full Pipe Coupling Is A Pipe Fitting Of Short Length That Has Two Pipes Joined Together By Threads At Both Ends. The Full Threaded Rod Coupling Alternatively Can Connect Two Rods Usually But Also Pipes In Special Cases. The Full Coupling ASME B16.11 Ranges Up To 4 Inches And It Could Differ In Material Make Such As The ASTM A182 SS Threaded Full Coupling Which Is Made Up Of A182 Stainless Steel. The Screwed Full Coupling Makes Tighter Connection By Means Of Screws Which Make It Easier To Fit, But Also Is Strengthened As Forged Threaded Full Coupling In The Manufacturing Process. The Different Threaded Full Coupling Dimensions Allow For Usages In Different Industries And Of Different Size Piping Applications.

HOW MANY TYPES FOR THREADED PIPE COUPLING?

Threaded Half Coupling & Full Coupling.

BSP Coupling & NPT Coupling.

Straight Coupling & Reducing Coupling.

MATERIAL GRADES OF BSP SOCKET

Alloy Steel Threaded Coupling

ASTM A182 F1, F5, F9, F11, F12, F22, F91

Duplex Steel Pipe Coupling

ASTM A182 F51, F53, F55, S 31803, S 32205, S 32550, S 32750, S 32760

Carbon Steel Threaded Fittings

ASTM A105, A694 F52, F60, F65, F70, A350 LF2, LF3

Stainless Steel Forged Fittings

ASTM A182 F304/304L, F304H, F316/316L, F310, F317, F321,F947

Dimensions Threaded Full and Half Couplings ASME B16.11
Class 3000
NPS End to End Outside Minimum
Diameter Length
  of Thread
A D B J
1/2. 48 28 10.9 13.6
3/4. 51 35 12.7 13.9
1 60 44 14.7 17.3
1¼ 67 57 17 18
1½ 79 64 17.8 18.4
2 86 76 19 19.2
2½ 92 92 23.6 28.9
3 108 108 25.9 30.5
4 121 140 27.7 33

 

Class 6000
NPS End to End Outside Minimum
Diameter Length
  of Thread
A D B J
1/2. 48 38 10.9 13.6
3/4. 51 44 12.7 13.9
1 60 57 14.7 17.3
1¼ 67 64 17 18
1½ 79 76 17.8 18.4
2 86 92 19 19.2
2½ 92 108 23.6 28.9
3 108 127 25.9 30.5
4 121 159 27.7 33

General notes:

Dimensions are in millimeters unless otherwise indicated.
Dimension (B) is minimum length of perfect thread.
The length of useful thread (B plus threads with fully formed roots and flat crests) shall not be less than J.

Different ASTM A182 SS Threaded Full Coupling sealing types are selected industry wise such as many pressure systems onboard ships use BSPP Screwed Full Coupling while many applications in the oil and gas industry use NPT Forged Threaded Full Coupling. NPT Thread Forged Screwed Full Coupling is an American Standard Taper Pipe Thread as per ANSI/ASME B1.20.1.
We produce Threaded Forged Full Coupling in below two most common standards for tapered threads

NPT American National Standard Taper Pipe Thread ANSI B16.11 Forged Threaded Full Coupling
BSPT British Standard Pipe Taper Thread ASME B16.11 Forged Threaded Coupling

Why use NPT Forged Screwed Full Coupling 3000LB Threaded?

threaded full pipe coupling NPT threads have an angle of 60°
NPT threads also have flattened peaks and valleys

Why use BSPT full threaded rod coupling?

BSPT threads have an angle of 55°
Compare to NPT ASME B16.11 Forged Threaded Coupling BSPT threads have rounded peaks and valleys