SS / Duplex & Super Duplex Forged Cap
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SS / Duplex and Super Duplex Forged Cap
EBY Fasteners offers a range of SS / Duplex and Super Duplex Forged Caps designed to meet the needs of various industries. For standard applications, our stainless steel (SS) forged caps provide reliable corrosion resistance and strength. These caps are well-suited for general industrial use, chemical plants, and many piping systems where moderate toughness is required
When the environment gets harsher, our Duplex forged caps take over. Their specialized composition provides superior strength and resilience against pitting, crevice corrosion, and stress cracking caused by chlorides. Choose Duplex caps for applications involving tougher chemicals or more demanding operating conditions
For the most extreme situations, EBY Fasteners’ Super Duplex forged caps are the top choice. These caps boast unparalleled corrosion resistance and mechanical strength, allowing them to withstand seawater, aggressive industrial chemicals, and high-pressure environments
For the most extreme situations, EBY Fasteners’ Super Duplex forged caps are the top choice. These caps boast unparalleled corrosion resistance and mechanical strength, allowing them to withstand seawater, aggressive industrial chemicals, and high-pressure environments
- ASTM / ASME A/SA 182 : This is the key standard for forged steel fittings (including caps). It defines the different grades, their chemical makeup, and the strength they must possess.
- F304/304L : These are your basic stainless steel options. They offer decent corrosion resistance for everyday use. 304L is slightly better for welding due to its lower carbon content.
- F316/316L : Adding molybdenum makes these grades more resistant to pitting and crevice corrosion, especially in environments with chlorides (like seawater).
- F51 (UNS S32205/S31803) : A popular Duplex grade, F51 offers a significant boost in corrosion resistance and strength. Choose it for tougher chemicals and more demanding conditions.
- F55 (UNS S32760) : This Super Duplex grade is the ultimate choice when corrosion resistance and strength are critical. It can withstand seawater, aggressive chemicals, and high pressures
- Design Standards : Forged caps adhere to standards like ASTM/ASME A/SA 182, ensuring dimensional precision, compatibility, and performance under pressure.
- Material Grades : Standards like ASTM A182 outline the specifications for various forged stainless, Duplex, and Super Duplex grades. Common choices include F304L, F316L, F51, and F55.
- End Connection Types : Forged caps typically feature threaded (NPT is common) or socket-weld ends, offering flexibility for installation and system integration.
- Pressure Ratings : The pressure class of a forged cap determines the maximum working pressure it can safely handle. Caps are rigorously tested to meet these standards.
- Chemical Composition : The specific alloy (like F51 or F55) dictates the cap's corrosion resistance. Elements like chromium, nickel, molybdenum, and nitrogen are carefully balanced to provide the right level of protection for your application.
- Mechanical Properties : Duplex and Super Duplex caps boast superior strength compared to standard stainless steel. Their tensile and yield strength ensure reliability and prevent deformation under pressure
- Robust Construction : Forged caps are incredibly strong due to their manufacturing process, making them ideal for high-pressure systems and demanding applications.
- Excellent Corrosion Resistance : These caps offer outstanding protection against various forms of corrosion, with Duplex and Super Duplex grades excelling in harsh chemical or seawater environments.
- Secure Sealing : Forged caps provide a reliable and leak-tight seal at the end of pipelines, preventing undesired leaks or contamination.
- Long Service Life : Their strength and corrosion resistance translate to extended lifespan and reduced maintenance requirements, making them a cost-effective solution in the long run.
- Pressure Handling : Forged caps come in various pressure classes to match a wide range of system requirements.
- Versatility : A variety of grades, sizes, and end-connection types (threaded, socket-weld) allows for adaptability to different piping systems and applications.
- Critical Applications : The strength and reliability of forged caps make them especially suitable for high-pressure, high-temperature, or critical systems where failure is not an option
- Refinery & Petrochemical : These caps are used to terminate pipelines carrying corrosive process fluids, seal storage tanks handling harsh chemicals, and protect sensitive equipment requiring leak-proof connections.
- Chemical : Forged caps are essential in terminating process lines and vessels handling highly corrosive chemicals, ensuring secure containment and preventing contamination.
- Oil & Gas : Super Duplex forged caps are found on subsea pipelines, offshore production platforms, and process equipment where seawater corrosion is a major concern. They provide a strong, reliable seal in these harsh environments.
- Power Plant : These caps are used in pipelines handling corrosive process fluids or high-pressure systems, ensuring reliable containment and preventing leaks.
- Offshore Platforms : Super Duplex forged caps seal pipelines and vessels handling seawater or corrosive process fluids. They also find use in structural elements exposed to the harsh marine environment.
- Ship Building : Use these caps in fuel lines, seawater systems, and various process piping where their strength and corrosion resistance promote longevity in the demanding shipboard environment.
- Industrial Machineries : Forged caps protect pipeline terminations and seal vessels in industrial machines handling corrosive fluids or operating under high pressure.
- Pharmaceuticals : Find these caps in process pipelines and vessels handling sensitive chemicals within pharmaceutical plants, ensuring purity and preventing leaks
Chemical Composition
| Element | Percentage |
|---|---|
| C (max) | 0.03 |
| Cr | 21.0-23.0 |
| Ni | 4.5-6.5 |
| Mo | 2.5-3.5 |
| N | 0.14-0.20 |
