the other tests.
Little Room for Error. It’s no secret
that seamless pipe products are usually
considered to be superior to welded pipe
products, especially regarding pressure
applications and any use that requires severe forming. In as-welded products, the
weld seam is less ductile than the parent
material and therefore is a weak point—
the area most likely to fail when the tube
is subjected to substantial internal pressure or mechanical forces.
In-line annealing evens the score, and
G & L verifies the robustness of its annealed products by performing destructive tests on lengths chosen at random. It
doesn’t test them once per day, once per
shift, or even once per hour, but about
every 45 minutes.
Depending on who you ask, seamless
tube and pipe tend to have a better measure of roundness than welded products.
Regarding welded tube, the key is to
purchase material with consistent characteristics, using quality tooling, and a
thorough understanding of tooling setup.
Last is wall thickness consistency. Extrusion mills and draw benches set a high
bar, but indeed some welded products
exceed the bar, according to Adams.
“Our tube has replaced seamless in
some cases,” Adams said. “Because the
internal mandrel drifts, the wall thickness
can change along the tube’s length,” he
said. “Making welded tube is a different
game altogether. The strip’s thickness is
extremely consistent,” he said.
When Adams lists a few of the applications for G & L’s products, it sounds
like the applications themselves also
have little room for error. Many of the
company’s customers make safety-crit-ical and mission-critical equipment, so
no one wants to skimp on quality.
“Nuclear power plants, aircraft de-icers, railroad switchgear, submarines,
and medical equipment are some of the
more high-profile applications for our
products,” Adams said.
A Story of Growth
In 2005, Gilreath sold the company to a
small group of private investors. At the
time, it was running seven days a week,
Since then, G & L has grown from
25 employees running three tube mills
to more than 150 employees operating
28 tube mills. The company has grown
through diversification into new markets
with new products—residential water
heaters, power generation, oil and gas,
military, food service, transportation,
medical, and semiconductors. In HVAC
markets, its products go into boilers, ul-
trapure water filtration, and systems for
swimming pools and large aquariums.
Made in USA
Hawkeye V2 Video Borescope, 1/4” w Weld in 3/4” stainless steel tube elded and drawn tube viewe
Your Eye Inside™