More and more with Pipe Fabrication

More and more with Pipe Fabrication and only in Piping & Fabrication blog, and lets continue this Definitions of Piping System.

Shot Blasting.

shot blasting machine

Mechanical removal of surface oxides and scale on the pipe inner and outer surfaces by the abrasive impingement of small steel pellets.

Single-Bevel-, Single-J, Single-U, Single-V-Groove Welds.

single bevel, single J, single U, single V groove welds

All are specific types of groove welds and are illustrated in Figure below.

Single-Welded Butt Joint.
A butt joint welded from one side only.

Size of Weld.

size of weld

For a groove weld, the joint penetration, which is the depth of chamfering plus the root penetration. For fillet welds,

Cross the Knowledge of Piping Fabrication

Huh, this mind is stuck on the middle of no where, I can't think clearly, I must be got a headache. But, still I will continue this post for Piping & Fabrication, because there is so much article that I have to post. now we already reach to the letter "S" of General Definitions and now we will cross the knowledge of Piping Fabrication.

Saddle Flange.

saddle flange

Also known as tank flange or boiler flange. A curved flange shaped to fit a boiler, tank, or other vessel and to receive a threaded pipe. A saddle flange is usually riveted or welded to the vessel.

Sample Piping.
All piping, valves, and fittings used for the collection of samples of gas, steam, water, oil, etc.

Sargol.
A special type of joint in which a lip is provided for welding to

Know More about Rolled Pipe, Root Edge, Root Face, etc.

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Rolled Pipe.

rolled pipe

Pipe produced from a forged billet which is pierced by a conical mandrel between two diametrically opposed rolls. The pierced shell is subsequently rolled and expanded over mandrels of increasingly large diameter. Where closer dimensional tolerances are desired, the rolled pipe is cold- or hot-drawn through dies and then machined. One variation of this process produces the hollow shell by extrusion of the forged billet over amandrel in a vertical, hydraulic piercing press.

Root Edge.
A root face of zero width.

Root Face.

nomenclature root face

That portion of the groove face adjacent to the root of the joint.

Continue of Piping System Reinforcement Definitions

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Quenching.

quenching

Rapid cooling of a heated metal.

Radiographic Examination or Inspection.
Radiography is a nondestructive test method which makes use of short-wavelength radiations, such as X-rays or gamma rays, to penetrate objects for detecting the presence and nature of macroscopic defects or other structural discontinuities. The shadow image of defects or discontinuities is recorded either on a fluorescent screen or on photographic film.

Reinforcement.
In branch connections, reinforcement is material around a branch opening that serves to strengthen it. The material is either integral in the branch components or added in the form of weld metal, a pad, a saddle, or a sleeve.

Surf The Deepest of Welding Position, Pressure in the Pipe System

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Plastic.
A material which contains as an essential ingredient an organic substance of high to ultrahigh molecular weight, is solid in its finished state, and at some stage of its manufacture or processing can be shaped by flow. The two general types of plastic are thermoplastic and thermosetting.

Polarity.

Polarity

The direction of flow of current with respect to the welding electrode and workpiece.

Porosity.
Presence of gas pockets or voids in metal.

Positioning Weld.

weld position

A weld made in a joint which has been so placed as to facilitate the making of the weld.

Postheating.
The application of heat to a fabricated or welded section subsequent to a fabrication, welding, or cutting operation. Postheating may be done locally, as by induction heating; or the entire assembly may be postheated in a furnace.

Postweld Heat Treatment.

postweld heat treatment

Any heat treatment subsequent to welding.

Preheating.
The application of heat to a base metal immediately prior to a welding or cutting operation.

Pressure.

pressure

The force per unit that is acting on a real or imaginary surface within a fluid is the pressure or intensity of pressure. It is expressed in pounds per square inch:

pressure

where     p = absolute pressure at a point, psi (kg/cm2)
              w = specific weight, lb/ft3 (kg/m3)
              h = height of fluid column above the point, ft (m)
              pa = atmospheric pressure, psi (kg/cm2)

The gauge pressure at a point is obtained by designating atmospheric pressure as zero:
    where p = gauge pressure.

To obtain absolute pressure from gauge pressure, add the atmospheric pressure to the gauge pressure.

Pressure Head.
From the definition of pressure, the expression p/w is the pressure head. It can be defined as the height of the fluid above a point, and it is normally measured in feet.

Purging.
The displacement during welding, by an inert or neutral gas, of the air inside the piping underneath the weld area in order to avoid oxidation or contamination of the underside of the weld. Gases most commonly used are argon, helium, and nitrogen (the last is principally limited to austenitic stainless steel).
Purging can be done within a complete pipe section or by means of purging fixtures of a small area underneath the pipe weld.

Pipe and Piping System

Monday again now, and that's mean busy times! and that proven that I can post for this Piping Fabrication blog at 10.30 in my work place. By the way, for some people today is very hard day, because they have to make a report, long report about the schedule of the next week preparation for long shutdown at the factory. And now we reach to the Pipe and Piping System of the General Definitions, and we will continue and continue this until I already reach the maximum ability, but that's very far from it. and here we go with the definitions.

Pass.
A single progression of a welding or surfacing operation along a joint, weld deposit, or substrate. The result of a pass is a weld bead, layer, or spray deposit.

Peel Test.
A destructive method of examination that mechanically separates a lap joint by peeling.

Peening.

peening

The mechanical working of metals by means of hammer blows.

Pickle.
The chemical or electrochemical removal of surface oxides. Following welding operations, piping is frequently pickled in order to remove mill scale, oxides formed during storage, and the weld discolorations.

Pipe.

PIPE

A tube with a round cross section conforming to the dimensional requirements for nominal pipe size as tabulated in ASME B36.10M

Make Friend with Piping Fabrication

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Overhead Position.

overhead position

The position of welding performed from the underside of the joint.

Oxidizing Flame.

oxidizing flame

An oxyfuel gas flame having an oxidizing effect caused by excess oxygen.

Oxyacetylene Cutting.

oxyacetylene cutting

An oxygen-cutting process in which metals are severed by the chemical reaction of oxygen with the base metal at elevated temperatures.