Manufacturer, Supplier & Exporter of PTFE-Coated Carbon Steel Ferrule Fittings

PTFE‑coated carbon steel ferrule fittings are ferrule‑type connectors (compression fittings) in which a base body of carbon steel (for strength, mechanical load capacity, and cost advantage) is coated or lined with PTFE (polytetrafluoroethylene). The PTFE layer provides chemical inertness, excellent corrosion resistance, low friction, and thermal stability to protect the underlying carbon steel from aggressive media. These fittings combine the mechanical strength of carbon steel with the chemical resistance and smooth surface qualities of PTFE..

Because of the PTFE coating, these ferrule fittings are highly resistant to acids, bases, solvents, and many corrosive chemicals, making them suitable for use in chemical, petrochemical, pharmaceutical, and process industries. The coating also reduces friction and sticking, helps prevent particle adhesion, and offers a clean, non‑reactive surface—important in high purity or sensitive fluid systems. Meanwhile, the carbon steel core offers structural robustness, pressure handling, and cost efficiency compared to solid PTFE or exotic alloy designs.

Producing PTFE‑coated carbon steel ferrule fittings involves careful surface preparation of the carbon steel (e.g. cleaning, grit blasting) followed by a PTFE application process (spraying, dipping, sintering, or bonding) to achieve the desired thickness and adhesion. The coating must be continuous, defect‑free, and uniform, especially in sealing zones and threads, to avoid corrosion under film. After coating, fittings are often tested (e.g. adhesion test, pressure test, coating thickness measurement) to ensure performance. Dimensional tolerances must still match standard ferrule fitting specifications (OD, ID, thread, sealing faces) to maintain compatibility..

These fittings find use in systems where aggressive fluids (acids, alkalis, solvents, corrosive gases) are transported and where metallic strength is needed. Examples include chemical plants, pharmaceutical processing, specialty chemical dosage systems, analytical instrumentation, semiconductor manufacturing, food & beverage (if compatible), and laboratory systems. They may also be used in environments where abrasion or particulate media might attack pure PTFE components..

PTFE-Coated Carbon Steel Ferrule Fittings are high-performance components designed for use in highly corrosive and demanding industrial environments. These fittings combine the durability and mechanical strength of carbon steel with the superior non-reactive, chemical-resistant properties of PTFE (Polytetrafluoroethylene) coating. The result is a fitting that can withstand aggressive chemicals, high temperatures, and pressure, making them an excellent choice for critical fluid handling systems.

PTFE-Coated Carbon Steel Ferrule Fittings

Specification

Product	PTFE-Coated Carbon Steel Ferrule Fittings
Base Material	Carbon Steel
Coating Material	PTFE (Polytetrafluoroethylene)
Coating Thickness	0.1 mm – 0.3 mm (customizable)
Size Range	1/8” to 2” OD (Tube Size)
Thread Types	NPT, BSPT, BSPP, Metric
Pressure Rating	Up to 6000 PSI
Temperature Range	-50°C to +230°C

Chemical Composition (Base Carbon Steel)

Element	Content (%)
Carbon (C)	0.17 – 0.20
Manganese (Mn)	0.30 – 0.60
Phosphorus (P)	Max 0.040
Sulfur (S)	Max 0.050
Iron (Fe)	Balance

Mechanical Properties

Property	Value
Tensile Strength	≥ 415 MPa
Yield Strength	≥ 240 MPa
Elongation	20% min
Hardness	≤ 180 HB

Dimension Chart

Tube OD (inch)	Thread Size	Length (A)	Hex (B)	Bore (C)
1/8"	1/8" NPT	28 mm	11 mm	4 mm
1/4"	1/4" NPT	35 mm	14 mm	6.5 mm
3/8"	3/8" NPT	42 mm	17 mm	9 mm
1/2"	1/2" NPT	48 mm	22 mm	12 mm

Equivalent Grades

Standard	Equivalent Grade
ASTM	A105 (Base Material)
DIN	C22.8
JIS	SS400

Equivalent Standards

Country	Standard
USA	ASTM A105
Germany	DIN 17200
Japan	JIS G3101

Other Types of Ferrule Fittings

Type	Description
Stainless Steel Ferrule Fittings	Corrosion-resistant fittings for general use
Brass Ferrule Fittings	Low-pressure applications with good machinability
PTFE-Coated Stainless Steel Fittings	Enhanced corrosion and chemical resistance
Monel Ferrule Fittings	Nickel-copper alloy fittings for marine & chemical service
Hastelloy Ferrule Fittings	High-performance fittings for harsh environments

The primary advantage of these fittings lies in their dual-material construction. The carbon steel core ensures structural integrity and pressure resistance, while the PTFE coating protects the fitting from corrosion, chemical attack, and surface contamination. These fittings also offer excellent thermal stability, low permeability, and a non-stick surface that prevents the accumulation of process residues, ensuring clean and efficient operation over extended periods..

Frequently Asked Questions (FAQs)

Q1: What is the benefit of PTFE coating on carbon steel ferrule fittings?

A1: The PTFE coating enhances corrosion resistance, prevents chemical attack, and provides a non-stick, smooth internal surface ideal for aggressive fluids.

Q2: Where can I use PTFE-coated carbon steel ferrule fittings?

A2: These fittings are suitable for use in chemical processing, pharmaceuticals, water treatment, and corrosive fluid systems operating under high pressure and temperature.

Q3: Do you supply these fittings across India?

A3: Yes, Riddhi Siddhi Impex supplies PTFE-coated ferrule fittings to major Indian cities like Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, and more.

Q4: Can I request custom sizes and threads?

A4: Absolutely. Custom coating thickness, sizes, and thread types like BSPT, NPT, or Metric are available upon request.