Hexagon Bushing

QS Pipe Fitting: Huaian Hexagon Bushing

Hexagon Bushing, 2 Inch NPT and class 3000# to ASME B16.11, a threaded reducer for joining different pipe sizes in a range of forged grades.

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One-Minute Overview

Hexagon bushing with a 2 Inch NPT end, rated class 3000#.
Built to ASME B16.11 for forged threaded fittings.
Offered in A105, F304/F316, F11/F22/F91 and F51 grades.
Reduces a threaded opening or joins two different pipe sizes.

A hexagon bushing is the small threaded fitting that steps one pipe size into another. It has a hex head for a wrench, a larger male thread and a smaller female thread, so it reduces a threaded opening or joins two pipes of different sizes in a single compact part. This one carries a 2 Inch NPT end and a 3000# class rating, and is made to ASME B16.11, the specification for forged steel threaded fittings. The tapered NPT thread gives a secure, leak-free connection, while the 3000# class suits high-pressure duty. Qishine supplies it in ASTM A105, F304, F316, F304L, F316L, A182 F11/F22/F91 and A182 F51, which covers everything from ordinary carbon steel to stainless, alloy and duplex grades.

Name: Hexagon Bushing
Size: 2 Inch
End: NPT
Material: ASTM A105, F304, F316, F304L, F316L, A182 F11/F22/F91, A182 F51
Class Rating: 3000#
Standard: ASME B16.11
Sizes, pressure classes and material grades are confirmed per inquiry, and a detailed specification sheet is available on request.

Two decisions drive the selection: the size step and the grade. Work out which male and female NPT sizes the bushing has to bridge, because the reduction is fixed in the part and cannot be adjusted on site; a 2 Inch body here means one specific step, so check the drawing rather than the shelf. Then pick the material. A105 carbon steel covers general high-pressure oil and gas duty, the F304 and F316 families bring corrosion resistance for cleaner or more aggressive media, the F11/F22/F91 alloy grades suit hotter service, and F51 duplex combines strength with corrosion resistance. Keep the bushing in a grade compatible with both pipes it joins, so the threaded connection does not become a galvanic or corrosion weak spot. The 3000# class and ASME B16.11 dimensions then fix the pressure and interchangeability.

Installation is quick but easy to get wrong. Clean both threads, check the male and female NPT for damage, and apply a sealant suited to the fluid and temperature - the seal is made on the tapered threads, not on the hex flats. Run the bushing in by hand first to prove it is not cross-threaded, then tighten with a wrench on the hex only, to the engagement the joint design calls for. Do not over-torque: a bushing is a relatively thin-walled reducer and a cracked body is worse than a weeping joint. Leave wrench clearance around the hex and support the adjoining pipe so the part is not carrying the line weight. Because the same bushing may be used on a high-pressure hydrocarbon line or a water or beverage line, state the medium on the inquiry so the grade and sealant are matched to the service.

FAQ

Q1. What does a hexagon bushing actually do?

It reduces a threaded opening, or joins two pipes of different sizes, in one compact forged part. A larger male NPT thread screws into the fitting or vessel, and a smaller female thread accepts the pipe, with a hex head in between for the wrench. It is the tidy alternative to stacking a coupling and a reducer, which saves a joint, a potential leak path and a little space on a crowded manifold.

Q2. With so many grades, which one should I order?

Let the fluid and the adjoining pipe decide. A105 carbon steel is the everyday high-pressure choice for oil and gas; F304 and F316 handle corrosive or clean media such as water and beverages; F11/F22/F91 alloy grades cover hotter duty; and F51 duplex brings strength plus corrosion resistance. Keep the bushing compatible with both pipes it joins so the thread does not become the weak spot, and confirm the grade on the inquiry.

Q3. Is the hex head just there to look tough?

It is there to be gripped, and only there. Tighten on the hex flats with a proper wrench, never on the threaded body with a pipe wrench that chews the seal surface. Hand-start the bushing to check it is not cross-threaded, use sealant suited to the medium, and stop at the specified engagement. A bushing is thin-walled, so the hex gives controlled leverage - treat it as a precision part, not a place to prove a point.

Q4. How long will production take?

Standard sizes are typically ready within 30 days, and in-stock items ship immediately. Larger or custom orders get a confirmed date per order, because the schedule depends on quantity, material, the bolt pattern you specify, and how busy production is at the moment you order.

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