Alloy C-4 is an austenitic nickel-molybdenum-chromium alloy with a
low carbon, silicon, and iron content. This alloy has a
significantly lower tendency to form precipitation in the
temperature range between 650 and 1,040 °C(1,202 - 1,904 °F),
improving its resistance to inter-crystalline corrosion. When
machined perfectly, no knife line attack occurs in the
heat-affected zones of awelding edge. Alloy C-4 is characterized
by: Very good resistance in a broad field of corrosive media, in
particular under strongly oxidizing conditions. Excellent
resistance to pitting, crevice and stress corrosion. The threaded olet is a kind of branch pipe table, which is used
for reinforcing the branch pipe connection. Threaded branch pipe
table is a kind of branch pipe table, which is widely used in
foreign countries in recent years. It is a reinforced pipe fitting
for branch pipe connection. Instead of the traditional reducing
tee, reinforcing plate, strengthening pipe section and other branch
pipe connection types, it has the outstanding advantages of safety
and reliability, reducing cost, simple construction, improving
medium flow path, series standardization, convenient design and
selection. Especially in high pressure, high temperature, large
diameter, thick wall pipe used increasingly widely, replacing the
traditional branch pipe connection method. The body of the threaded
branch pipe is made of high-quality forgings, and the material is
the same as that of the pipe, including carbon steel, alloy steel,
stainless steel, etc. The branch pipe and main pipe are welded, and
the branch pipe table and branch pipe or other pipes (such as short
pipe, wire plug, etc.), instruments, valves are connected by butt
welding, socket welding, thread and other types.