Product Name: Threaded Long Nipple
Material: Stainless Steel 304
Standard: ISO 4144 (Dimensions, ref.)
Fitting Type: Long Pipe Nipple
Connection: Male x Male Threaded NPT
Pressure Rating: Class 150 (150LB)
Length: 4 inches (approx. 100mm)
Application: Plumbing, Spacing, General Piping

Product Introduction
A long nipple is a pipe nipple that exceeds standard dimensions and is designed for connections spanning specific distances. When the distance between two female-threaded ports exceeds the length of a standard nipple, a long nipple serves as a short connecting pipe, perfectly solving the problem. It eliminates the complex on-site cutting and threading of standard pipe, providing a standardized, convenient, and reliable solution for achieving connections at specific spacings.

Manufacturing Process Flow
To ensure uniform pipe wall quality and overall strength, our long pipe unions are "tube-shaped," meaning they're made from high-quality 304 stainless steel seamless tubing. The production process begins with the seamless tubing being precisely cut to the required 4-inch lengths. NPT threads are then precisely machined on both ends using a CNC lathe. This direct machining process from high-quality tubing ensures that each long pipe union has the same pressure-bearing capacity and reliability as standard pipe.

NPT Threaded Connection
This long pipe union utilizes the NPT (National Pipe Tapered Thread) connection, featuring a 60° thread angle and a 1:16 taper, creating an effective mechanical seal when tightened. This connection eliminates the need for welding and is easy to install and remove. It's one of the most common connection methods for general industrial and residential piping in North America and globally, offering exceptional cost-effectiveness and flexibility.

304 Material Properties
304 stainless steel is the most widely used material for general-purpose pipe unions and fittings. It offers excellent corrosion resistance in most everyday environments, including water and air, effectively preventing rust. Its excellent mechanical strength and cost-effectiveness make it an ideal balance, ensuring durable and secure pipe connections without incurring excessive material costs. It is well-suited for general industrial and commercial water supply and drainage systems.

Application Scenarios
Long pipe unions play an important role in a variety of specialized connection scenarios. For example, they provide the required length when connecting faucets or valves between internal and external walls through a wall. When assembling complex valve manifolds or instrument panels, they can be used as standard spacers, providing the necessary spacing between components. Furthermore, they are ideal for connecting two fixed-position female threaded ports, offering great versatility.