Stainless Steel 904L Pipe

What is Stainless Steel 904L Pipe?

Stainless steel 904L Pipe is a non-stabilized super austenitic grade having a low carbon concentration. Pipes within this range are designed for moderate to high corrosion resistance services in a wide range of stress-induced environments. Having a good concentration of chromium and nickel content coupled with the additions of molybdenum and copper these pipes offer excellent resistance against corrosion cracking and crevice corrosion. The grade is non-magnetic and has excellent toughness, formability, and weldability. The high grade of contents utilized in producing these components makes these high-quality pipes expensive.

Difference Between ASTM B677 UNS N08904 Seamless Pipe and SS 904L ERW Tube

Piping equipment in the piping industry is generally produced utilizing some basic concepts. Seamless and Erw manufacturing process is one of the unique and oldest methods in producing these modules. Both these processing systems can be distinguished based on certain features.

• Production process- ASTM B677 UNS N08904 Seamless Pipe is an extruded metal, which is manufactured by passing hot billets. For ERW tubes, the metal is rolled and subsequently welded longitudinally.
• Classification- A seamless pipe is classified based on its schedules and nominal diameters. Tubes of ERW are characterized based on their wall thickness and outside diameters.
• Price- ERW pipes are cheaper in comparison to standard seamless pipes.

ASTM A312 Tp 904L Material Length

ASTM A312 Tp 904L is a very versatile metal, which is utilized in a range of applications. A 904L pipe is generally available with nominal sizes ranging between 1/4 to 30nm. These pipes are available in schedules between 5S to 80S. For seamless tubes, the sizes range between 3.35mm to 101.6mm and welded tubes between 6.35mm to 152mm.

AISI 904L Coiled Tubing vs Gr. 904L Boiler Tubes

Some major differentiating factors between AISI 904L Coiled tubing and Gr. 904L boiler tubes are listed below.

• Coiled tubing is a continuous small-diameter steel pipe length with related surface equipment coupled with associate drilling technology. Boiler tubes are specially designed metal components present in the interior of boilers which can withstand high pressures and temperatures during different chemical processes.
• Types- There are two types of coil tubing which include truck and skid mounted. Boiler tubes can be either water or fire tube boiler systems.
• Applications- Coiled tubings are an operation that is utilized in hydraulic fracturing, drilling, well completions, and removing or filling sand in wellbores. Boiler tubes are designed to process a range of chemicals at different temperatures.

SS 904L Pipe Application

The major applications of the SS 904L Pipe include

• Air pollution control systems in scrubbers used in coal and power plants.
• Chemical processing of organic and inorganic acids.
• Cooling devices in seawater.
• Pulp and paper processing systems.
• Oil and gas production and processing.
• Condensers and heat exchangers.
• Pharmaceutical industries.
• Metallurgical processing.

Stainless Steel 904L Tubes Corrosion

All grades of stainless steel are prone to corrosion and rust. 904L grade tubes make use of high-grade raw materials, which make them highly resistant against corrosion compared to other grades. The addition of copper and molybdenum in the already exiting high concentration of chromium and nickel helps in improving the resistance of these tubes to reducing acids. The grade is also tolerant against general corrosion, stress corrosion cracking, along with crevice corrosion. Apart from this, has excellent tolerance against chloride attacks in seawaters.