Wednesday, April 27, 2011

Inside to The Pipe Elements and Welding Type (SAW)

One more day has passed, and I still stuck in this factory without freedom here. And to release this feeling I just open the internet connection and start to post for Piping & Fabrication, and I have to quick because the time is catching me. Now we go inside to the Pipe Elements and Welding Type (SAW).

Statically Cast Pipe.
Pipe formed by the solidification of molten metal in a sand mold.

Straight Polarity.
straight polarity

The arrangement of direct-current arc welding leads in which the work is the positive pole and the electrode is the negative pole of the welding arc; a synonym for direct-current electrode negative.

Stress Relieving.
stress relieving

Uniform heating of a structure or portion thereof to a sufficient temperature to relieve the major portion of the residual stresses, followed by uniform cooling.

Stringer Bead.
stringer bead

A type of weld bead made by moving the electrode in a direction essentially parallel to the axis of the bead. There is no appreciable transverse oscillation of the electrode.
The deposition of a number of string beads is known as string beading and is used extensively in the welding of austenitic stainless-steel materials. See also Weave Bead.

Structural Attachments.
Brackets, clips, lugs, or other elements welded, bolted, or clamped to the pipe support structures, such as stanchions, towers, building frames, and foundation. Equipment such as vessels, exchangers, and pumps is not considered to be pipe-supporting elements.

Submerged Arc Welding (SAW).
Submerged Arc Welding (SAW)

An arc welding process that produces coalescence of metals by heating them with an arc or arcs drawn between a bare metal electrode or electrodes and the base metals. The arc is shielded by a blanket of granular fusible material. Pressure is not used, and filler metal is obtained from the electrode and sometimes from a supplementary welding rod, flux, or metal granules.

Supplemental Steel.
Structural members that frame between existing building framing steel members and are significantly smaller than the existing steel.

Swaging.
swaging pipe

Reducing the ends of pipe and tube sections with rotating dies which are pressed intermittently against the pipe or tube end.

Swivel Joint.
A joint which permits single-plane rotational movement in a piping system.

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