Sweating is a form of soldering in which the surfaces of the work are first
covered with a thin layer of solder by rubbing them with the hot iron after
it has been dipped in or touched to the soldering stick. These surfaces are
then placed in contact and heated to a point at which the solder melts and
unites. Sweating is much to be preferred to ordinary soldering where the
form of the work permits it. This is the only method which should ever be
used when a fitting is to be placed over the end of a length of tube.
_Soldering Holes._--Clean the surfaces for some distance around the
hole until they are bright, and apply flux while holding the hot iron near
the hole. Touch the tip of the iron to some solder until the solder is
picked up on the iron, and then place this solder, which was just picked
up, around the edge of the hole. It will leave the soldering iron and stick
to the metal. Keep adding solder in this way until the hole has been closed
up by working from the edges and building toward the center. After the hole
is closed, apply more flux to the job and smooth over with the hot iron
until there are no rough spots. Should the solder refuse to flow smoothly,
the iron is not hot enough.
_Soldering Seams._--Clean back from the seam or split for at least
half an inch all around and then build up the solder in the same way as was
done with the hole. After closing the opening, apply more flux to the work
and run the hot iron lengthwise to smooth the job.
Pages:
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188