Barred Tee

QS Pipe Fitting: Fujian Barred Tee

A234 WPB carbon steel barred tee with welded internal bars that let product flow while stopping pigs and solid debris at the branch.

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One-Minute Overview

Barred tee in A234 WPB carbon steel for oil, gas and petrochemical piping.
Welded internal bars stop pigs and solid debris from entering the branch.
Fluid keeps flowing through the run while the side opening stays guarded.
Built to ANSI, ISO, JIS and DIN practice for straightforward system integration.

A barred tee is the branch fitting that lets a pipeline split without letting anything solid slip into the side line. Inside the branch, a set of bars or baffles is welded across the opening: the gaps are wide enough for the product to flow, but too narrow for a cleaning pig, a gauge plate or a stray tool to pass. Made here from A234 WPB carbon steel, it is specified for oil and gas networks, subsea installations and petrochemical plants, where a loose object in a branch can damage a valve, a pump or a satellite well connection. It conforms to ANSI, ISO, JIS and DIN practice, so it drops into an existing piping class without redrawing the spool.

Name: Barred Tee
Type: Branch tee with welded internal bars
Material: A234 WPB carbon steel
Standard: ANSI, ISO, JIS, DIN
Function: Blocks pigs and debris while allowing branch flow
Sizes, dimensions and end preparations are confirmed per inquiry, and a detailed specification sheet is available on request.

The bars are the whole point of the fitting, so start the selection there. Bar spacing is set by what has to be stopped - a foam pig, a scraper, a slug of scale - and by how much open area the branch needs to keep pressure loss reasonable. Ask for the bar layout together with the branch diameter and the pig type, because a pattern drawn for one line can either let a pig through on the next or throttle the flow. Match the tee material to the run pipe: A234 WPB carbon steel is the usual choice for oil and gas duty, and the chromium and molybdenum alloying in the steel adds the corrosion resistance and strength that high-pressure, high-temperature service expects.

Installation is a butt weld job, so treat the ends like any other welding fitting. Bevel the branch and run ends to the joint design, set the tee so the bars sit square to the flow, and weld with a procedure qualified for the material and wall. Keep the internal bars clear of spatter and inspect the opening once the joint cools - a bar knocked loose is worse than no bar at all. On pigged or subsea lines, prove pig passage through the main run before tie-in and record the bar orientation on the spool drawing, so the next crew knows which way the barrier faces. A bar layout drawing can be supplied with the quotation.

FAQ

Q1. What exactly do the internal bars stop?

They stop anything solid that travels with the product - cleaning pigs, gauge plates, scale flakes and tools left in the line - from turning into the branch, while letting the fluid itself pass through the gaps. On a pigged trunk line this keeps the pig in the main run and protects smaller branch equipment such as valves, instruments and satellite well connections downstream.

Q2. Will those bars mess up my flow?

Not if the bar spacing is chosen with the branch in mind. The gaps are sized to pass the design flow with an acceptable pressure drop, so the bars behave like a coarse screen rather than a throttle. Tell us the branch diameter, the flow rate and what has to be stopped, and the layout is set around those numbers instead of being guessed from a catalogue page.

Q3. Can I just weld in a normal tee and hope the pig behaves?

You could, and the pig will vote with its diameter - it tends to take the branch you least expect. A plain tee leaves the opening wide, so a pig, a scraper or a chunk of scale can wander into a side line and lodge against a valve. The barred tee solves that mechanically, with welded bars, instead of relying on luck and a very patient maintenance crew.

Q4. What payment terms do you accept?

T/T, L/C at sight and other internationally accepted terms. The exact terms are agreed with you before production starts, because the payment schedule has to match the order value, the shipping method and the delivery schedule you need — which is also why we confirm them up front rather than after shipment.

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