Forged NPT Threaded Flange

Dimensions: ASME/ANSI B16.5, ASME B16.47, GOST 12820, EN1092, GOST 12821, GOST
33259
What is a threaded flange?
A forged threaded flange（also called companion flanges/screw flanges / NPT
flanges/TH flanges） is a type of pipe flange that features internal threads on
its bore, allowing it to be directly screwed onto the external threads of a
pipe.

This design eliminates the need for welding, making it a convenient choice for
pipes that cannot be welded or in situations where welding is not desirable.
Key Features & Applications
1. Welding-Free Connection – Perfect for explosive or flammable environments
(e.g., petrol stations, chemical plants) where welding sparks pose a risk.

2. Easy Installation & Maintenance – Can be quickly assembled or disassembled
compared to welded flanges.

3. Cost-Effective for Small Pipes – Typically used for ½” to 6” pipes,
though larger sizes (up to 24”) are available upon request. The amount of
additional machining and labor hours that go into producing a larger diameter
threaded connection makes them less popular than slip-on flanges or weld neck
flanges.

4. Limited to Low-Pressure/Low-Temperature Use – Best suited for non-toxic
fluids and moderate conditions, as threads may weaken under high heat or
pressure.

5. Face Types – Only available with flat face (FF) or raised face (RF)
finishes, not suitable for high-pressure ring-type joints.

Specification:
Standard: ASNI/ASTMB16.5 / 16.36/16.47A/16.47B B2220 – 2001,
DIN2527/2636/2637/2638/2566/2576/2633/2635/264 , 2/2653/2655.

Pressure Rate: 150LBS to 2500LBS / PN10 to PN400

Dimension: 1/2″ to 48″

Material: Carbon steel, Alloy Steel, Stainless steel.

Thread type: NP / BSP

Pressure rating:
class 150LBS、300LBS、400LBS、600LBS、900LBS、1500L , BS、2500LBS

Dimensions:

ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48, API 605, AWWA AND
DRAWING

Material:

CS

Stan , dard: ASTM / ASME A/SA 105 / 350 LF 2
SS

Standards: ASTM / ASME A/SA 182
AS

Standard: ASTM / ASME A/SA 182
How to install a threaded flange?
Clean the pipe threads and the inside of the flange to ensure a secure and
leak-free connection. Align the threaded flange with the pipe and screw it onto
the pipe’s threaded end by hand until it is snug.

Use a wrench to further tighten the flange onto the pipe. Be careful not to
over-tighten, as this can damage the threads or pipe. Optionally, use thread
sealant or Teflon tape to prevent leaks in lower-pressure systems, ensuring a
tight seal.

Choose JS Fittings as your Threaded Flanges Supplier
With 40+ years of experience in steel flange manufacturing, JS Fittings
provides:

1. High-quality carbon steel, stainless steel, and alloy threaded flanges

2. Custom sizes and pressure ratings (ASME, ANSI, DIN, and more)

3. Fast delivery & expert technical support

Contact Us for a quote or project consultation—we help you source flanges
faster, smarter, and more affordably than competitors!

Minimum Order: 100 sets

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