Manufacturer, Supplier & Exporter of Stainless Steel Threaded Union

Stainless steel threaded unions are essential components used in piping systems to connect two pipes while allowing for easy disassembly without cutting the pipe. These unions are widely used in industries such as oil & gas, chemical processing, water treatment, food and beverage, and pharmaceuticals. Their threaded ends make them ideal for applications where welding is not practical or preferred, especially in areas that require frequent maintenance or reconfiguration. Made from high-grade stainless steel like SS 304, SS 316, or duplex alloys, these unions offer excellent resistance to corrosion, pressure, and high temperatures...

Riddhi Siddhi Impex is a reputable manufacturer and supplier of stainless steel products based in Mumbai, India. With decades of experience in the metal industry, the company specializes in supplying high-quality stainless steel threaded unions and other pipe fittings. Their products are manufactured to meet international standards such as ASTM, ASME, DIN, and BS, ensuring durability, precision, and reliability. The company focuses on customer satisfaction through consistent quality, competitive pricing, and timely deliveries.

The stainless steel threaded unions offered by Riddhi Siddhi Impex are available in various grades including SS 304, SS 316, SS 316L, Duplex 2205, and Super Duplex 2507. These grades are chosen based on their corrosion resistance, mechanical properties, and suitability for different environments. Threaded unions are designed according to standards such as ASME B16.11 and are available in pressure classes like 2000 lbs, 3000 lbs, and 6000 lbs. The threads are typically NPT (National Pipe Thread), BSP (British Standard Pipe), or customized as per client requirements...

Riddhi Siddhi Impex supplies stainless steel threaded unions across a wide network of Indian cities. Their logistics and distribution systems are capable of delivering products efficiently to both metro cities and industrial zones. Cities like Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, and Ahmedabad are major hubs for their supplies. The company ensures prompt delivery to meet project deadlines and operational requirements, making them a reliable partner for industries across India...

Beyond the major metros, Riddhi Siddhi Impex also supplies to cities like Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, and Chandigarh. These cities house several manufacturing units, processing plants, and refineries that require high-performance fittings. The company has built strong logistics partnerships and inventory systems that allow them to maintain product availability and reduce lead times, even in cities that are not traditional trading hubs..

Stainless Steel Threaded Union – Specifications & Details

Product Specifications

Product Name	Stainless Steel Threaded Union
Manufacturer	Riddhi Siddhi Impex
Material Grades	SS 304, SS 316, SS 316L, Duplex 2205, Super Duplex 2507
Size Range	1/8” to 4” (DN6 to DN100)
Pressure Class	2000 lbs, 3000 lbs, 6000 lbs
Standards	ASME B16.11, MSS-SP-83, ANSI, DIN, BS
Thread Types	NPT, BSP, BSPT

Chemical Composition (Typical for SS 304)

Element	Percentage (%)
Carbon (C)	0.08 max
Manganese (Mn)	2.00 max
Phosphorus (P)	0.045 max
Sulfur (S)	0.030 max
Silicon (Si)	1.00 max
Chromium (Cr)	18.0 – 20.0
Nickel (Ni)	8.0 – 10.5

Mechanical Properties (SS 304)

Property	Value
Tensile Strength	515 MPa (min)
Yield Strength (0.2% Offset)	205 MPa (min)
Elongation	40% (min)
Hardness	HRB 92 (max)

Dimension Chart (ASME B16.11 - Sample Sizes)

Nominal Size (inches)	Diameter (mm)	Length (mm)	Thread Type
1/2"	21.34	50	NPT
3/4"	26.67	55	NPT
1"	33.4	60	BSPT
2"	60.3	75	BSP

Equivalent Grades

Grade	UNS	EN	JIS
SS 304	S30400	1.4301	SUS 304
SS 316	S31600	1.4401	SUS 316
SS 316L	S31603	1.4404	SUS 316L
Duplex 2205	S31803	1.4462	SUS 2205

Equivalent Standards

Standard	Description
ASME B16.11	Forged Steel Fittings, Socket-Welding and Threaded
MSS-SP-83	Class 3000 Steel Pipe Unions, Socket-Welding and Threaded
DIN 2999	Pipe Threads where Pressure-tight joints are made on the Threads
BS 3799	Forged Fittings - Specifications

Other Types of Stainless Steel Unions

Type	Description
Socket Weld Union	Used for high-pressure piping systems with welding required
Butt Weld Union	For permanent welded piping connections
Male-Female Union	Threaded union with male-female end design for compact joints
Flat Seat Union	Used in low-pressure applications for easy dismantling

Riddhi Siddhi’s supply chain extends deeply into southern and western India, including cities such as Mysuru, Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, and Akola. These regions represent key centers for engineering, chemical, and infrastructure development. Stainless steel threaded unions are essential for piping systems in these industries, and Riddhi Siddhi’s strong supply chain helps maintain steady procurement cycles for businesses in these cities..

Frequently Asked Questions (FAQs)

Q1: What are the common applications of Stainless Steel Threaded Union?

A1: It is widely used in heat exchangers, plumbing, chemical plants, oil & gas pipelines, and food processing systems.

Q2: Can you provide threaded unions in duplex or super duplex grades?

A2: Yes, we manufacture and supply unions in duplex 2205 and super duplex 2507 for high corrosion environments.

Q3: What is the pressure rating for SS threaded unions?

A3: Available in pressure classes of 2000 lbs, 3000 lbs, and 6000 lbs depending on size and specification.

Q4: Are material test certificates provided?

A4: Yes, we provide MTCs as per EN 10204 3.1 and 3.2, and third-party inspection on request.