SS / Duplex & Super Duplex Cross Tee
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SS / Duplex and Super Duplex Cross Tee
EBY Fasteners is a leading manufacturer of SS / Duplex and Super Duplex Cross Tees. These fittings are ideal for applications requiring strong corrosion resistance and high-pressure tolerance
Made from either duplex or super duplex stainless steel, these cross tees are well-suited for the oil and gas, chemical processing, and petrochemical industries. They can handle the harsh environments and demanding conditions present in these sectors. EBY Fasteners manufactures them to various specifications and sizes, ensuring compatibility with your existing piping system
Both SS / Duplex and Super Duplex Cross Tees from EBY Fasteners offer several advantages. They provide superior strength and corrosion resistance compared to standard stainless steel. Additionally, their ability to withstand high pressure makes them ideal for critical applications. EBY Fasteners’ ISO certifications guarantee quality and adherence to industry standards
Both SS / Duplex and Super Duplex Cross Tees from EBY Fasteners offer several advantages. They provide superior strength and corrosion resistance compared to standard stainless steel. Additionally, their ability to withstand high pressure makes them ideal for critical applications. EBY Fasteners’ ISO certifications guarantee quality and adherence to industry standards
- F304/304H : These are the most basic austenitic stainless steels, offering good general corrosion resistance and formability. 304H is a high-carbon variant with improved high-temperature strength.
- 309, 310 : These grades provide better resistance to high-temperature oxidation and scaling compared to 304/304H.
- 316, 316L : These offer enhanced corrosion resistance, particularly against chlorides, compared to 304. 316L has a lower carbon content, making it more weldable.
- 317L : This grade includes molybdenum for improved resistance to pitting corrosion, especially in acidic environments.
- 321, 347 : These grades contain stabilizing elements (titanium or columbium) to prevent intergranular corrosion during welding.
- 904L : This is a highly alloyed austenitic stainless steel with exceptional resistance to a wide range of corrosive media, including sulfuric acid.
- UNS S32750 (also known as 2507) : This is a widely used super duplex grade with excellent resistance to pitting and crevice corrosion, particularly in chloride-containing environments.
- UNS S32304 (also known as 2304) : This duplex grade offers a good balance between strength, corrosion resistance, and cost-effectiveness compared to super duplex grades
- Materials : Stainless steel cross tees start with grades like 304 and 316. For better corrosion resistance, 316L is a good option. Duplex stainless steel (grades 2205 and 2507) increases strength and handles tougher environments. Super Duplex (like Zeron 100) offers the maximum corrosion resistance and strength for the most extreme conditions.
- Construction : Seamless cross tees are forged from a single piece of material, giving them superior strength for high-pressure applications. Welded tees are made by joining sections, offering a more cost-effective solution for less demanding uses.
- Sizes : Cross tees are available in a wide range of Nominal Pipe Sizes (NPS) to fit into standard piping systems. You'll also pick a wall thickness (schedule), with common options being SCH 10, SCH 40, and SCH 80.
- End Connections : Threaded connections (often NPT) are easy to install and provide a reliable seal. Butt-weld connections are permanent, offering exceptional strength and preventing leaks. Socket-weld connections provide strength and ensure smooth flow within the piping.
- Applications : Stainless steel tees work well for moderate pressures and environments where corrosion is a concern. Duplex tees step up the pressure handling and toughness, while also resisting harsher chemicals. Super Duplex tees are the ultimate choice for seawater, aggressive chemicals, or extremely high-pressure situations
- Corrosion Resistance : Duplex and Super Duplex cross tees offer superior protection against pitting, crevice corrosion, stress corrosion cracking (especially in chloride environments). Super Duplex grades excel in the most extreme conditions.
- Strength : These cross tees boast significantly higher strength than standard stainless steel counterparts. This translates to increased pressure handling capabilities and overall durability.
- Ease of Installation : Cross tees with threaded connections allow for simpler installation and replacement compared to flanged or welded types. They require proper sealing and tightening for a secure connection.
- Versatility : Available in a wide range of Nominal Pipe Sizes (NPS) and wall thicknesses (schedules) to ensure compatibility with various piping systems.
- Superior Performance in Harsh Environments : Duplex and Super Duplex cross tees withstand exposure to aggressive chemicals, seawater, and challenging operating conditions that would compromise standard stainless steel.
- Longer Service Life : The combination of exceptional corrosion resistance and strength leads to an extended lifespan for these cross tees, reducing maintenance requirements and lowering long-term costs
- Refinery & Petrochemical : SS / Duplex and Super Duplex cross tees are used in pipelines (for both moderately and highly corrosive fluids), heat exchangers handling corrosive fluids, and storage tanks for chemicals with varying levels of aggressiveness.
- Chemical : These cross tees are essential for process piping handling acids, alkalis, and other harsh chemicals. They're also found in reaction vessels and storage tanks for highly corrosive substances.
- Oil & Gas : Look for these tees in subsea pipelines where seawater corrosion is a major concern, production equipment exposed to corrosive produced fluids, and onshore gathering lines handling potentially corrosive oil and gas.
- Power Plant : Cross tees are used in cooling water systems (especially those handling seawater) and auxiliary piping systems that deal with boiler feedwater and other process fluids.
- Offshore Platforms : Super Duplex tees are vital in seawater systems like firewater, ballast, and intake lines. They're also used in process lines handling corrosive fluids and even some structural elements exposed to the harsh marine environment.
- Ship Building : Super Duplex is the go-to choice for ballast water systems due to its seawater resistance. Additionally, these cross tees are found in fuel oil lines and engine cooling water systems.
- Industrial Machineries : Cross tees connect pipes and tubes in various industrial machines where a degree of corrosion resistance is required, depending on the fluids being transported.
- Pharmaceuticals : These tees are used in process piping and potentially reaction vessels where less aggressive chemicals are involved, and hygiene is a top priority.
- Pumps & Compressors : Cross tees provide secure and reliable connections within the piping systems associated with pumps and compressors.
- Dairy & Food : You'll find these tees in process piping handling food products with moderate corrosivity, as well as in cleaning and sanitation systems where resistance to chemicals is needed.
- Sugar Mills : Cross tees are used in juice processing lines where the sugarcane juice and other fluids might have corrosive properties.
- Textile Machineries : These tees find applications within dyeing and finishing equipment, where they are integrated into piping systems handling dyes, chemicals, and process fluids.
- Fertilizers & Pesticides : Cross tees are utilized in pipelines and storage vessels handling fertilizers and pesticides of moderate corrosivity
Chemical Composition
| Element | Percentage |
|---|---|
| Chromium, Cr | 24 – 26% |
| Nickel, Ni | 6 – 8% |
| Molybdenum, Mo | 3 – 5% |
| Manganese, Mn | 1.20% max |
| Silicon, Si | 0.80% max |
| Copper, Cu | 0.50% max |
| Nitrogen, N | 0.24 – 0.32% |
| Phosphorous, P | 0.035% max |
| Carbon, C | 0.030% max |
| Sulfur, S | 0.020% max |
| Iron, Fe | Balance |
