Manufacturer, Supplier & Exporter of Carbon Steel Threaded Half Coupling

A Carbon Steel Threaded Half Coupling is a pipe fitting that has internal threads (female threads) on one end and is meant to join with a male threaded pipe or fitting. The “half coupling” designation means it is shorter or smaller in length than a full coupling: it’s used when you want to reduce or extend a run by connecting one end without having two equal pipes joined (effectively one side). Because it is made of carbon steel, it offers good mechanical strength, cost‑effectiveness, and is widely used in industrial piping systems where corrosion and pressure conditions permit...

Carbon steel used for threaded couplings typically falls under standards such as ASTM A105, ASTM A234, or equivalent domestic specifications. These standards define tensile strength, yield strength, chemical composition (carbon, manganese, phosphorus, sulfur, etc.), and allowable impurities. The threads themselves must conform to recognized standards (e.g. NPT, BSP, or ISO thread types) and are machined to tight tolerances to ensure leak‑free joints. The coupling is sometimes heat treated or normalized to relieve stresses, and often coated (black oxide, galvanizing, plating) for corrosion resistance in exposed environments...

Carbon Steel Threaded Half Coupling is a highly durable and widely used pipe fitting designed for connecting threaded pipes in a variety of industrial applications. Manufactured using high-grade carbon steel, these couplings are engineered to handle high pressure and temperature conditions while offering excellent mechanical strength and long service life. They are typically used in industries such as oil & gas, petrochemicals, power plants, refineries, and water treatment facilities. The threaded design ensures a secure and leak-proof connection, making them ideal for both temporary and permanent piping systems....

Riddhi Siddhi Impex is a prominent manufacturer and supplier of Carbon Steel Threaded Half Coupling in India. With years of experience in the metal and piping industry, the company offers premium-quality couplings that adhere to global standards such as ASTM, ASME, and DIN. Their manufacturing process involves high-precision forging, threading, and quality testing to ensure the fittings meet strict industrial requirements. The couplings are available in various sizes, pressure classes, and thread types, and can also be customized as per specific client needs..

As a trusted name in the steel industry, Riddhi Siddhi Impex supplies its Carbon Steel Threaded Half Couplings across a vast network of domestic cities. Their supply chain covers major industrial hubs like Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, and Kolkata, where demand for high-performance pipe fittings remains consistently high. These cities are home to numerous infrastructure, construction, and energy projects that require reliable and efficient piping solutions...

Carbon Steel Threaded Half Coupling Specification

Specification

Property	Details
Material	Carbon Steel (ASTM A105)
Type	Threaded Half Coupling
Manufacturing Process	Forged and Threaded
Standards	ASTM A105, ASME B1.20.1
Application	Oil & Gas, Chemical, Power, Water Treatment, Marine Industries

Chemical Composition (%)

Element	Composition
Carbon (C)	0.35 max
Manganese (Mn)	0.60 - 1.05
Phosphorus (P)	0.035 max
Sulfur (S)	0.040 max
Silicon (Si)	0.10 - 0.35

Mechanical Properties

Property	Value
Tensile Strength	485 MPa (Min)
Yield Strength	250 MPa (Min)
Elongation	22% (Min)
Hardness	197 HB Max

Dimension Chart (ASME B1.20.1 Thread Standard)

Nominal Pipe Size (NPS)	Outside Diameter (mm)	Thread Size	Length (mm)
1/8"	10.3	1/8" NPT	25
1/4"	13.7	1/4" NPT	30
3/8"	17.1	3/8" NPT	38
1/2"	21.3	1/2" NPT	45
3/4"	26.7	3/4" NPT	55
1"	33.4	1" NPT	60
2"	60.3	2" NPT	90

Equivalent Grades

Standard	Equivalent Grade
ASTM	A105
ASME	SA105
DIN	1.0460
JIS	STPG370

Equivalent Standards

Organization	Standard
ASTM	A105
ASME	B1.20.1 (Thread Standard)
DIN	2605
ISO	7-1

Other Types of Threaded Couplings

Type	Description
Full Coupling	Connects two pipes of the same diameter
Half Coupling	Connects a pipe to a fitting or valve
Reducing Coupling	Connects pipes of different sizes
Threaded Union	Allows easy disconnection of pipes

In addition to metro cities, Riddhi Siddhi Impex also caters to growing industrial markets in tier-2 and tier-3 cities such as Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, and Bhopal. The company ensures prompt delivery and consistent availability of its products by maintaining stock points and logistics coordination centers. This enables quick turnaround times and competitive pricing, which are critical for time-sensitive projects..

Frequently Asked Questions (FAQs)

Q1: What is a Carbon Steel Threaded Half Coupling?

A1: It is a forged pipe fitting with internal threading designed to connect pipes or fittings by screw threads.

Q2: What are the main applications of these couplings?

A2: They are used in oil & gas, water treatment, chemical plants, and other industrial piping systems requiring threaded connections.

Q3: Does Riddhi Siddhi Impex offer custom sizes?

A3: Yes, customized dimensions and pressure ratings are available upon request to meet specific project requirements.

Q4: Are these couplings corrosion resistant?

A4: Carbon steel offers good mechanical strength; corrosion resistance can be enhanced with coatings or additional treatments depending on application.