20 10 月 2018
20 10 月, 2018

A105 Half Coupling BSPT 3000lb

 A105 Half Coupling BSPT 3000lb

Forged Threaded Fittings

Singapore customers continually buy Forged Threaded Couplings from us. They are mostly ASTM A105 Half Coupling and SS316 Threaded Coupling.

Why always buy from us?Because they think our products are outstanding with high quality and competitive price. But how much do you know about Carbon Steel Half Coupling? Let’s go to see representative A105 Half Coupling.

What is Threaded Half Coupling?

Threaded Half Couplings are threaded only at one end, the other end is welded or fastened to pipes or fittings. In some areas people also call it Threaded Half Socket. It can be used in commercial and industrial environment to transfer water, oil, gas or air.

ASTM A105 Half Coupling is frequently used in hose connection except piping system. The threaded end is screwed onto a faucet, while the other end is clamped onto the hose. It is more suit for small diameter pipes with low pressure. Aerospace industry also uses half couplings as connectors for pressurized fuel piping.

Due to its extensive application, it is provided in various diameters and pressure ratings. Diameter is from 1/8” to 4” and pressure are 3000# and 6000#.

ASTM A105 Half Coupling Dimensions

Half Coupling Dimensions

Half Coupling Dimensions

The dimension of half coupling is same to full coupling except the length. Length is 1/2 of full coupling. We can get the data from below half coupling chart.

Nominal Size End-to-End Outside Diameter Length of Thread
L D
DN NPS 3000&6000 3000 6000 L2 min L5 min
6 1/8 16 16 22 6.4 6.7
8 1/4 17.5 19 25 8.1 10.2
10 3/8 19 22 32 9.1 10.4
15 1/2 24 28 38 10.9 13.6
20 3/4 22.5 35 44 12.7 13.9
25 1 30 44 57 14.7 17.3
32 1 1/4 33.5 57 64 17.0 18.0
40 1 1/2 39.5 64 76 17.8 18.4
50 2 43 76 92 19.0 19.2
65 2 1/2 46 92 108 23.6 28.9
80 3 54 108 127 25.9 30.5
100 4 60.5 140 159 27.7 33.0

A105 Forged Pipe Fittings

Forged Couplings are designed for the industries which available in carbon steel, alloy steel and stainless steel. Usually A105 Half Coupling Threaded is the first choice. Why customers are interested so much? Let’s to know their function and advantage

Carbon Steel Material ASTM A105 covers Seamless Forged Carbon Steel Piping components for use in pressure systems at ambient and high-temperature service.

A105N Forged Fittings have good performance, less impurities, fine internal structure, and is not prone to defects, because forging process can change the metal structure and improve its mechanical properties.

ASME B16.11 Forged Fittings

ASME B16.11 Forged Fittings

ASME B16.5 Flanges

ASME B16.5 Flanges

MSS SP-97 Outlet

MSS SP-97 Outlet

Material A105 is for ASME B16.11 Forged Fittings, ASME B16.5 Flanges and MSS SP-97 Outlet.

ASTM A105 Half Coupling Chemical Composition

C Mn P S Si Cr Mo
0.15max 0.6-1.05 0.035 0.04 0.1min 0.3 0.12

ASTM A105 Half Coupling Mechanical Properties

Tensile Strength (Mpa) Yield Strength (Mpa) Elongation (%) Hardness
485 250 30% 187

BSP Threaded Fittings

 

BSP Threaded Fittings

BSP Threaded Fittings

British Standard Pipe are shorten as BSP which threads come in two versions: parallel (BSPP), and tapered (BSPT).

While BSPT thread has a taper thread with 55 degree flank angle, which is the biggest difference with NPT thread. It has been adopted internationally for interconnection and sealing pipes and fittings. Its diameter increases or decreases along the thread length.

Compare with NPT Threaded Fittings, BSP Threaded Fittings are popular in Asia, Europe and UK. North America is rarely used unless the attachment is important. Male BSPT fittings should thread into a female BSPT fittings with 2 turns of thread sealant.

BSPP thread is parallel thread and often used in pressure systems on board ships.

BSPT Threads Dimension Chart

Thread Size Threads

Per Inch

Pitch

mm

Major Dia of the Thread Gauge

Length

mm

mm in
1/16 28 0.907 7.723 0.304 4
1/8 28 0.907 9.728 0.383 4
1/4 19 1.337 13.157 0.518 6
3/8 19 1.337 16.662 0.656 6.4
1/2 14 1.814 20.995 0.825 8.2
5/8 14 1.814 22.911 0.902
3/4 14 1.814 26.441 1.041 9.5
1 11 2.309 33.249 1.309 10.4
1 1/4 11 2.309 41.91 1.65 12.7
1 1/2 11 2.309 47.803 1.882 12.7
2 11 2.309 59.614 2.347 15.9
2 1/2 11 2.309 75.184 2.96 17.5
3 11 2.309 87.884 3.46 20.6
4 11 2.309 113.03 4.45 25.5