304 Casting Elbow Fitting 1 inch Class 150 Threaded NPT

304 Casting Fitting Elbow 1" Class 150 Threaded NPT

Product Name: Threaded 90° Elbow
Material: Stainless Steel 304 / Casting Grade CF8
Standard: ASTM A351 (Material) / ISO 4144 (Dimensions, ref.)
Fitting Type: 90° Elbow, Casting
Connection: Threaded NPT
Pressure Rating: Class 150
Application: Water Systems, Drainage, General Low-Pressure Piping
Size: 1 inch (DN25)

The SMLSCO cast elbow series offers various forms to meet different pipeline layout requirements:

• 90° elbows for standard right angle turns
• 45° elbows for gentle turns
• Street Elbows with internal and external threads

One end of the internal and external thread elbow is internal thread and the other end is external thread, which can be directly connected to another internal thread pipe without the need for pipe joints, effectively saving installation space and connection points. It is an ideal choice for compact layouts.

Threaded fittings mainly follow two international thread systems: NPT and BSP.

• NPT (American standard pipe taper thread): 60° profile angle, sealed by the taper of the thread itself (1:16)
• BSP (British Standard Pipe Thread): 55° profile angle, divided into taper thread (BSPT) and parallel thread (BSPP) for sealing

This elbow adopts NPT thread, which is the most common connection form in North America and general industrial fields.

The Class 150 cast threaded elbow is an ideal solution for low-pressure fluid delivery systems. They are widely used in:

• Water supply and drainage network of civil buildings
• Fire sprinkler systems
• Agricultural irrigation
• Compressed air and water pipelines of ordinary industries

Its convenient installation, no need for welding, and reliable thread sealing performance make it a highly cost-effective pipeline connection choice in non high pressure, non corrosive critical applications.

According to ASTM A351 standard, the casting grade of 304 stainless steel is CF8. Although there is a slight difference in chemical composition between the two, it is widely accepted in the industry to use materials labeled as "304" instead of CF8 under common operating conditions.

Similarly, although our product dimensions are based on international standards such as ISO 4144, they are mainly produced according to widely accepted general specifications in the industry. When customers mention these standards, our products usually meet their usage requirements.

Our cast pipe fittings are produced using precision casting (silica sol process) to achieve excellent dimensional accuracy and surface smoothness. The process includes:

• Making wax molds
• Wrapping multiple layers of refractory materials to form a ceramic shell
• Heating to melt and remove the wax mold
• Pouring melted stainless steel into the hollow shell
• Cooling and solidifying
• Crushing the shell to obtain high-precision pipe blanks
• Final machining and tapping processes