Pipe fittings are sections that form a system by assembling with pipes with an intention of altering flow diameter, changing the direction of it, or bifurcating it. There are several types of fittings such as threaded, socket weld, buttweld, and so on. Buttweld fitting manufacturers in India fabricate products that are compliant with ASME B16.9 standards.
Buttweld fittings are made into various shapes consisting of tees, reducers, elbows, caps, crosses, pipe bends, and many more. They are often accessible in materials like carbon steel and stainless steel. Furthermore, metals such as aluminum, nickel alloy, high yield carbon, and duplex materials are used as well.
Benefits of buttweld fittings?
- As linkage between parts is welded, they form a hermetic seal
- The strength of the piping system gets augmented because of the absence of any interruptions in shape after welding
- Incessant turns in direction of system eliminate turbulent flow and drops in pressure
- Cost-effective and are great in terms of longevity
- Buttweld fitting supplier customizes them in sizes up to 72” unlike other types which are made in limited sizes
- Occupies less space compared to its counterparts
Bevelling
Buttweld fittings have bevelled ends since bevelling is required to make a butt joint. Besides this, the angle of the bevel relies on the thickness of the wall. Bevels reduce surface area and yet, have enough plane to accommodate pieces of metal to be joined.
Types of BW fittings
- Buttweld elbow fits
Those elbows which are smaller in size are produced using the Mandrel process or cold-forming method that largely involves cutting, heating, and forming whereas larger ones are simply cut out from readily welded pipes or plates. Frequently used elbows are 45, 90, and return elbow. Apart from that, there are few types as in mitered and reducing elbows which are manufactured on special demand.
- Short radius and Long radius types
The distance from centre to surface in short radius is similar to ideal pipe size while long radius has this distance is 1.5 times the recommended pipe size.
- Buttweld reducers
Reducers modify pipe bore size up to 2 to 3 units in order to avoid large pressure drops. They are mainly of two sorts- concentric and eccentric. Concentric ones are centered on each other when the eccentric ones are placed in an offset to one another. Eccentric reducers serve a similar purpose to that of concentric ones except that they are installed horizontally. Reducers are commonly tailored out by the cold forming method and conform to ASME norms.
- Pipe caps
These are intended to divert or isolate the flow while maintenance is being carried out or due to any other reason. They are elliptical and custom-made from almost any high-grade material in different sizes.
- Buttweld tees
Straight, barred and reducer are types of buttweld joint tees.
- Straight tee
It is used for the bifurcation of pipelines at 90 degrees. It is also called an Equal tee as it branches or joins pipes of the same diameter.
- Barred tee
Exclusively used for pig dealings, this comprises welded bars on branching ends that would restrict pig from the main pipe into the branched pipe.
- Reduced tee
This one has a bore size 2 to 3 units smaller on the branched side. Since both endings of this cross are not the same in diameter, it is also known as an unequal tee.
- Buttweld cross
A kind of tee that is rarely a requisite as it is utilized when the double split is necessary at the right angle. Dimensions and quality of such crosses are specified under ASME B16.9 and MSS SP43.
- Pipe bends
These are employed in order to diverge the flow of the piping network. Such fittings do not have specified angles or parameters to which direction of flow changes, unlike elbows where they have designated angles and directions. These are low-cost structural fits that minimize the totality of pipes called for.
Seamless and welded BW fittings
Seamless means there is no welding demarcation between two pieces. Buttweld fitting exporters create it by shaping heated portions and ergo, they do not seem to possess welds. On the other hand, we have welded ones that have visible welding lines.
Key industrial applications of buttweld fittings
These units have found their operations in industry set-up like petrochemical, chemical, water treatment, nuclear power generation, cryogenic plants, paper production, gas treatment, and breweries. Almost majority of heavy industries count on butt joint apparatus mainly because it is economical and sturdy.
How do you choose your ideal fitting?
There are few but inevitable quality check steps that need to be performed at the time of purchase so that one can rest assured.
- To begin with, measurements are to be inspected in accordance with main pipe works. The diameter of both pipe and fitting must be the same for a seal to be leak-proof.
- There is certainly important information that is inscribed on the surface including ASME standards and manufacturing time period which helps to anticipate the strength of fitting.
- One can find out essential information and evaluate the quality of the product by material test certification
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