Couplings

Couplings are connecting elements designed for the hermetic joining of two straight pipe sections of the same diameter. They provide a strong connection without changing the flow direction, featuring easy installation and a compact design. Couplings ensure reliable and uninterrupted pipeline operation even under high pressure and elevated temperatures. They are made from various materials resistant to aggressive environments, making them suitable for use in gas supply systems and the petrochemical industry.

Filters

Connection
End connection type (input x output)
Model
Nominal size, NPS (inch)
Nominal size, NPS2 (inch)
Size
Standard
Steel grade
Thread type
Type of fitting

Name	Connection	End connection type (input x output)	Inner diameter, ID (mm)	Length, l (mm)	Model	Nominal diameter, DN	Nominal size, NPS (inch)	Nominal size, NPS2 (inch)	Outer diameter, OD (mm)	Size	Standard	Steel grade	Thread type	Type of fitting	Weight 1 pc (kg)
American 1 1/2" CL3000 FTExFTE NPT BS 3799	THRD - threaded	TEXTE - threaded ends	0	79	—	40	1 1/2"	—	60	—	BS 3799	A182 Gr. F11 CL 2	NPT Female - tapered female thread	Coupling-American conical	1.03
American 1 1/2" CL3000 FTExFTE NPT BS 3799	THRD - threaded	TEXTE - threaded ends	0	79	—	40	1 1/2"	—	60	—	BS 3799	A105	NPT Female - tapered female thread	Coupling-American conical	1.03
American 1 1/2" CL3000 FTExFTE NPT BS 3799	THRD - threaded	TEXTE - threaded ends	0	79	—	40	1 1/2"	—	60	—	BS 3799	A182 Gr. F5	NPT Female - tapered female thread	Coupling-American conical	1.03
Connection Hammer Fig 602 1" 6000 PSI SCH XXS BW	BW - butt welding	—	15.2	0	Fig 602	0	1"	—	33.4	—	—	AISI 4130	—	Connection Hammer	1.8
Connection Hammer Fig 602 1" 6000 PSI SCH XXS BW	BW - butt welding	—	15.2	0	Fig 602	0	1"	—	33.4	—	—	A350 Gr. LF2 CL 1	—	Connection Hammer	1.8
Connection Hammer Fig 1502 4" 15000 PSI NPT	THRD - threaded	—	0	0	Fig 1502	0	4"	—	146	—	—	AISI 4130	NPT Female - female thread	Connection Hammer	29
Connection Hammer Fig 1502 4" 15000 PSI NPT	THRD - threaded	—	0	0	Fig 1502	0	4"	—	146	—	—	A350 Gr. LF2 CL 1	NPT Female - female thread	Connection Hammer	29
American conical 1/2" FTExMTE BSP ISO 4144	THRD - threaded	TEXTE - threaded ends	0	57	—	15	1/2"	—	21.3	—	ISO 4144	X2CrNiMo17-12-2 / 1.4404 / 316L	BSPP Female/BSPT Male - Parallel Female Thread/Conical Male Thread	Coupling-American conical	0.18
American conical 1/2" FTExMTE BSP ISO 4144	THRD - threaded	TEXTE - threaded ends	0	57	—	15	1/2"	—	21.3	—	ISO 4144	X6CrNiMoTi17-12-2 / 1.4571 / 316Ti	BSPP Female/BSPT Male - Parallel Female Thread/Conical Male Thread	Coupling-American conical	0.18
American conical 1/2" FTExMTE BSP ISO 4144	THRD - threaded	TEXTE - threaded ends	0	57	—	15	1/2"	—	21.3	—	ISO 4144	X2CrNi18-9 / 1.4307 / 304L	BSPP Female/BSPT Male - Parallel Female Thread/Conical Male Thread	Coupling-American conical	0.18

Connecting and reducing couplings for pipelines at competitive prices. A wide range of ASME couplings: threaded, combined, union, and couplings for oil and gas production pipelines. Delivery to the destination point. Couplings are designed for leak-tight connection of pipes in industrial pipeline systems. They ensure reliable fixation of pipeline sections while maintaining system integrity under high loads. Manufacturing materials include carbon and low-alloy steels, alloy grades with increased strength and heat resistance, as well as stainless austenitic, duplex, and super duplex steels. The coupling design compensates for axial displacement and stabilizes pipeline operation under temperature fluctuations and exposure to aggressive environments. The products comply with international standards such as ASME, BS, EN, and ISO, and are widely used in the oil and gas, petrochemical, chemical, and power generation industries.

Connecting couplings: types and characteristics

Connecting couplings differ in design, rigidity, and pipe fixation method. Depending on operating conditions, both rigid and flexible models are used—for systems with vibration, thermal expansion, or axial displacement. Some couplings allow quick installation without welding, which simplifies pipeline assembly and maintenance. The design ensures reliable fixation and tight sealing even under high pressure and variable loads. All models are intended for use in technically demanding sections of industrial pipelines.

Reducing couplings: features and dimensions

Reducing couplings are designed to connect pipes with different outer diameters within the same system. They provide a reliable transition between pipeline segments without additional compensating elements. Structurally, such fittings may have threaded or welded ends. It is important that during the transition between pipes of different diameters, the requirements for tightness and load resistance are maintained. Reducing couplings are often used when modernizing existing pipelines, allowing new sections to be integrated without replacing the entire line.

FAQ

1. Which type of connection is preferable for pipelines experiencing axial expansion due to temperature fluctuations?

Flexible coupling models that allow movement within the joint are optimal. This helps compensate for linear pipe expansion without compromising tightness.

2. Can couplings be used in systems with high-velocity flow?

Yes, provided that a model with a reinforced body and optimized internal geometry is selected to minimize turbulence and hydraulic losses.

3. Which couplings are suitable for installation in confined spaces?

Models that do not require welding and allow installation with minimal clearance are preferred. This enables connection without dismantling the pipeline.

Comments

Comment 1: Are couplings suitable for temporary pipelines used in field conditions?

Yes. In such cases, quick-installation models that allow easy dismantling are commonly used, making them convenient for temporary or modular systems.

Comment 2: Are rigid couplings suitable for pipelines with uneven load distribution?

In conditions of uneven loads, couplings with compensating properties are generally preferred. Rigid couplings can be used if the pipeline structure is stable and thermal deformation is not expected.

Comment 3: Can a coupling deform under axial load?

If the allowable axial load is exceeded, displacement or deformation may occur. Therefore, it is important to consider calculated forces and select a coupling with sufficient strength margin.

Send requests

Fill out the form to submit a request for the purchase of our products or to receive the necessary advice. Our manager will contact you as soon as possible.

* Enter your name

* Your phone number

* Company name

* Enter e-mail address

Appeal