Cs45 90D Elbow

QS Pipe Fitting: Ningbo CS45 90D Elbow

A 1/2 inch Cs45 90D elbow in 45# carbon steel with a threaded NPT end, made to ASME B16.9 for petroleum pipeline duty.

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One-Minute Overview

A 90 degree threaded elbow in 45# carbon steel for petroleum pipeline direction changes.
Threaded NPT end gives a compact, leak-tight joint with no field welding.
Made to ASME B16.9 dimensions in a 1/2 inch size.
Sizes and end types are confirmed per inquiry against the line drawing.

A 90 degree elbow is the standard way to turn a pipeline by a right angle, and the Cs45 90D Elbow does it with a threaded NPT connection instead of a welded joint. Machined from 45# carbon steel and built to ASME B16.9 dimensions, it suits the 1/2 inch lines found across petroleum pipeline skids, metering sets and compact manifolds. The threaded end makes installation quick on site and lets a fitter remove the fitting later for maintenance. Because the joint relies on the thread rather than a weld, correct sealing and torque matter more than bead profile, and the grade is chosen to match the carbon steel pipe it joins.

Name: Cs45 90D Elbow
Type: 90 degree threaded elbow
Size: 1/2 Inch
Material: 45# carbon steel
Standard: ASME B16.9
End: Threaded NPT
Usage: Petroleum pipeline
Packing: Veneer case or pallet
Sizes in inches, wall schedules and end preparation are confirmed per inquiry, and a detailed specification sheet is available on request.

Start with the thread form and the mating pipe. NPT threads seal by interference as the tapered flanks wedge together, so a proper sealant or tape and a controlled torque are what keep the joint leak-tight at pressure. Check that the female thread is clean and undamaged, and never force a mismatched taper. Match the 45# carbon steel grade and the 1/2 inch size to the run pipe, and confirm the ASME B16.9 envelope so the fitting clears nearby supports once it is made up. A dry fit is worth the minute: a 90 degree elbow has a fixed hand, and you cannot rotate a threaded joint back without loosening it. Every size, wall schedule and end type is confirmed per inquiry against the spool drawing.

Installation is straightforward but not careless. Coat the male thread, engage it by hand first to catch cross-threading, then tighten with a wrench to the recommended turn count without over-torquing the body. On petroleum service, pressure-test the assembled line and recheck the joint after the first thermal cycle. The bare carbon steel surface should be kept dry and lightly oiled in storage, and veneer cases or pallets protect the threads in transit. Inspect the sealing faces on receipt, cap the openings, and keep the fittings segregated so a 45# elbow is not swapped with a stainless one in the stores.

FAQ

Q1. Why choose a threaded NPT elbow over a butt weld one on this line?

On small-bore 1/2 inch lines a threaded joint is faster to install, needs no welding crew or hot-work permit, and can be undone later for maintenance or instrument changes. The trade-off is a lower pressure and temperature ceiling than a full-penetration butt weld, so it suits utility, drain and skid piping rather than the hottest high-pressure headers.

Q2. Do I really need sealant on an NPT thread, or is tight tight enough?

You really do. NPT seals by the tapered thread flanks interfering as they wedge home, and the fine spiral leak path stays open without a sealant or tape to fill it. Hand-tight plus a measured wrench turn with a proper compound is the reliable recipe; bare metal on metal may hold at first and then weep after a few thermal cycles.

Q3. Will a 45# carbon steel elbow survive a winter on the rack, or should I baby it?

Give it a little care. The 45# grade is strong and weldable but it is plain carbon steel, so bare threads and machined faces will rust if they sit in the rain. That is why the fittings ship in veneer cases or on pallets, capped and dry. Keep them under cover, leave a light oil film on the threads, and they will be ready when the fitter is.

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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