Stainless Steel 347 Ferrule Fittings

Manufacturer, Supplier & Exporter of Stainless Steel 347 Ferrule Fittings

Stainless Steel 347 is an austenitic stainless steel grade stabilized with niobium (columbium) which helps it resist sensitization and intergranular corrosion when exposed to temperature ranges of approximately 425–900 °C. Because of that stabilizing element, SS 347 maintains better strength and oxidation resistance in high-temperature environments than non-stabilized grades. A ferrule fitting (often in instrumentation or compression tube systems) uses a ferrule sleeve to grip tubing tightly and maintain a leak‑proof seal. Combining the 347 alloy with the ferrule fitting design yields components suited for elevated temperature services, thermal cycling, and aggressive process fluid exposure.

Riddhi Siddhi Impex is a trusted manufacturer and supplier of stainless steel products in India, including a wide range of pipe fittings, forged components, flanges, and tube fittings. While the company primarily focuses on general stainless steel and alloy fittings, they also have the capability to produce and supply specialized products like Stainless Steel 347 Ferrule Fittings. Backed by robust infrastructure, skilled manufacturing, and strict quality control, Riddhi Siddhi ensures each fitting meets global standards such as ASTM A182 and A479.

Stainless Steel 347 Ferrule Fittings are high-performance components used in demanding industrial applications that require excellent resistance to high temperatures and intergranular corrosion. These fittings are made from SS 347, a niobium-stabilized austenitic stainless steel grade known for its superior thermal stability and strength, especially in applications where repeated heating and cooling cycles are present. Ferrule fittings are crucial in fluid and gas systems, offering leak-proof connections without the need for welding, making them ideal for use in instrumentation, chemical processing, and power generation systems.

These fittings are widely used in sectors such as petrochemical plants, refineries, heat exchangers, and instrumentation systems, where SS 347’s resistance to carbide precipitation and high-temperature scaling is crucial. The ferrule fittings are available in various configurations including unions, elbows, tees, and reducers, and are machined precisely to ensure tight seals and reliable performance under high pressure and thermal cycling. SS 347 Ferrule Fittings offer advantages over standard grades like 304 and 316, especially in applications involving continuous operation at elevated temperatures.

Riddhi Siddhi Impex caters to clients across India, supplying Stainless Steel 347 Ferrule Fittings to major domestic cities including Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, and Rajkot. Their strong distribution network ensures timely delivery and reliable service, whether for bulk industrial orders or custom specifications. The company also offers technical documentation, test certificates, and third-party inspection reports when required.

Stainless Steel 347 Ferrule Fittings Specifications

Specification	ASTM A182 / ASME SA182, ASTM A479 / A276
Size Range	1/16” to 2” (Inch), 3mm to 50mm (Metric)
Type	Double Ferrule, Single Ferrule, Compression Tube Fittings
Connection	Male/Female Threaded, Tube-to-Tube, Tube-to-Male
Pressure Rating	Up to 6000 PSI

Chemical Composition of SS 347

Element	Content (%)
Carbon (C)	≤ 0.08
Chromium (Cr)	17.0 – 20.0
Nickel (Ni)	9.0 – 13.0
Manganese (Mn)	≤ 2.0
Silicon (Si)	≤ 0.75
Phosphorus (P)	≤ 0.045
Sulfur (S)	≤ 0.030
Niobium (Cb+Ta)	10xC min to 1.10 max

Mechanical Properties of SS 347

Property	Value
Tensile Strength	≥ 515 MPa
Yield Strength (0.2% offset)	≥ 205 MPa
Elongation	≥ 40%
Hardness (Brinell)	≤ 217 HB

Standard Dimension Chart (mm)

Tube OD	Thread Size	Length (L)
6 mm	1/8” NPT	28
10 mm	1/4” NPT	35
12 mm	3/8” NPT	38
15 mm	1/2” NPT	42
22 mm	3/4” NPT	48

Equivalent Grades

Standard	Grade
UNS	S34700
EN	1.4550
JIS	SUS 347
BS	347S31

Equivalent Standards

Standard	Specification
ASTM	A182, A276, A479
ASME	SA182, SA479
DIN	1.4550

Other Types of Ferrule Fittings

Type	Description
Union	Connects two tubes
Elbow (90° / 45°)	Changes flow direction
Tee	Three-way tube connection
Bulkhead Union	Connects tubes across panels
Male Connector	Tube to male thread
Female Connector	Tube to female thread

In addition to major metros, Riddhi Siddhi also supplies its products to rapidly growing industrial cities such as Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, and Chandigarh. Their logistics support allows delivery to regions where infrastructure development and industrial expansion demand high-quality stainless steel fittings. They understand the requirements of diverse industries and offer products tailored to meet application-specific standards.

Frequently Asked Questions (FAQs)

Q1: Where are Stainless Steel 347 Ferrule Fittings used?

A1: These fittings are used in high-temperature and corrosive environments like refineries, chemical plants, and power generation systems.

Q2: What pressure ratings do SS 347 ferrule fittings support?

A2: These fittings typically support pressures up to 6000 PSI depending on size and type.

Q3: Can Riddhi Siddhi Impex supply custom sizes?

A3: Yes, they offer custom configurations and dimensions based on client specifications and application requirements.

Q4: Do you offer material test certificates?

A4: Yes, material test certificates (MTC), third-party inspections, and other QA documentation are available on request.