Stainless Steel 316 Pipe Fittings are the standard for high-performance piping systems. They are used to connect, branch, change direction, or seal pipes in environments that demand high corrosion resistance and purity. Unlike standard steel, **SS 316** contains Molybdenum, giving it superior resistance to chlorides (like salt water) and acids.
This guide from Glory Engineering Supplies serves as a complete technical reference for our **Stainless Steel 316** threaded fittings. It covers the common types (Elbows, Tees, Unions), thread standards, and pressure ratings to help you build a reliable, leak-proof system.
We stock 316/316L Stainless Steel, the premier material for chemical, marine, and food-grade applications, offering the highest corrosion resistance.
Our fittings feature clean, precise threads (NPT & BSP) to ensure a tight, leak-proof seal when properly installed with sealant.
Our standard fittings are "investment cast" and rated for 150# (or 3000# for forged), suitable for most industrial and chemical applications.
We maintain a massive inventory of all fitting types—Elbows, Tees, Unions, Nipples, Sockets, and more—ready for immediate dispatch.
Fittings are used to build and configure any piping system. All types are available from Glory in Stainless Steel 316.
Used to change the direction of flow. Available as Female x Female or Male x Female (Street Elbow).
Creates a 90-degree branch from a main line. An "Equal" tee has all ports the same size.
A three-part fitting that joins two pipes, but allows for quick disconnection without cutting the pipe.
A short fitting with two female threads, used to join two male-threaded pipes of the same size.
A short piece of pipe with male threads on both ends, used to connect two female fittings.
Used to connect pipes of two different sizes. A "Bushing" is a compact reducer with one M x F thread.
Used to seal the end of a line. A "Cap" (female) fits over a male pipe; a "Plug" (male) fits into a female fitting.
Connects a threaded pipe system to a flexible hose, secured with a clamp. (Often a "UMC" or Hose Mender).
Understanding the material and thread standard is critical for compatibility.
| Specification | Standard | Glory's Offering |
|---|---|---|
| Material | ASTM A351 (Casting) / A182 (Forging) | We stock Stainless Steel 316 / 316L. This grade contains molybdenum, giving it superior corrosion resistance over 304, especially against chlorides and acids. |
| Pressure Rating | ASME B16.3 | Our standard threaded fittings are rated to 150# (Class 150). We also stock higher-pressure fittings (e.g., 3000# / 6000#) for hydraulic and high-pressure use. |
| Thread Standard | ASME B1.20.1 / ISO 7-1 | We stock fittings in both major thread types: NPT (American Tapered) and BSP (British Standard Pipe). These are *not* interchangeable. |
NPT and BSP are the two most common but are not compatible.
Tapered threads (like NPT) require a sealant to create a leak-proof joint.
The main difference is the addition of **Molybdenum** (an alloy) in 316. This gives SS 316 vastly superior corrosion resistance, especially against chlorides (like salt water, de-icing salts) and many industrial acids. 316 is the standard for chemical and marine applications.
This is a pressure class, not a direct pressure rating. Class 150 threaded fittings are generally rated for up to **150 PSI (10 Bar)** for steam or high-temp applications, but can often handle up to 500 PSI or more for cold, non-shock water/air applications. For high-pressure hydraulics, you must use 3000# or 6000# rated forged fittings.
No. While some sizes are close, the thread angle (60° vs. 55°) and pitch are different. Attempting to connect them will damage the threads and create a leak. Always verify your thread type.
A Union (often called "UU" for Union to Union) is a three-part fitting. It has two female-threaded ends and a center "nut". This allows you to connect two pipes, but more importantly, allows you to **disconnect** the pipes in the middle for maintenance without having to cut or unscrew the entire pipe run.
From a single elbow to a full project bill of materials, Glory has the high-quality Stainless Steel 316 fittings you need. Contact our technical team for a consultation or request a quote today.
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