Annealed Heavy Wall Stainless Steel Tubing

Annealed Heavy Wall Stainless Steel Tubing ASTM A312 TP316L SS Welded Pipes

Annealed Heavy Wall Stainless Steel Tubing, as the name suggests, is a pipe with a seam or a weld-joint. Seam pipe is thought to be able to withstand higher pressure, higher temperatures, higher mechanical stress and a corrosive atmosphere. It can be found in a wide range of applications such as in oil and gas, refinery, petrochemical, chemical, fertilizer, power, automotive, bearing, mechanical and structural.

The production of our seam pipes is tightly regulated and all of the pipes we stock have been fully tested to international standards to ensure we only supply the highest quality products.

Our seam pipes are manufactured in l in accordance with:

ASTM A790 • ASTM A312 • ASTM A409
ASTM A269 • ASTM B423 • ASTM B444
Dimensions in accordance with:

ANSI B36.19 • ANSI B36.10

304 – 304 and 304L (low carbon version) is a low carbon austenitic alloy. By keeping the carbon at
.03% max, it minimizes carbide precipitation during welding.
 

310 – Grade 310, combining excellent high temperature properties with good ductility and weldability,
is designed for high temperature service. It resists oxidation in continuous service at temperatures up
to 1150°C provided reducing sulphur gases are not present. It is also used for intermittent service at
temperatures up to 1040°C. Applications for molten salt, sulfur bearing gas and heat exchanger and
recuperator tubing.

316 – 316 is the 2nd most common stainless after 304 and is commonly used in food and surgical
applications. The addition of moly prevents specific forms for corrosion. By keeping the carbon at
.03% max, it has been shown to minimize carbide precipitation during welding. Decreasing the sulfur
will enhance its ability for electro-polishing. It is also known as a marine grade due to the increased
resistance to chloride corrosion in comparison to 304. It is generally used in marine applications and
watches, pharmaceutical equipment, valve bodies, bleaching and dying equipment or the textile and
food industry.

317 – 317 is a molybdenum-bearing austenitic chrome nickel similar to 316 except the alloy content is
higher. It was developed primarily to more effectively resist the attack of sulfurous acid compounds.
321 – this is titanium bearing stainless and it is stabilized against carbide precipitation. In higher
temperatures the carbon combines with the titanium to form a harmless titanium carbide leaving the
chrome to maintain full corrosion resistance. 321 is basically 304 modified by adding titanium in an
amount at least 5 times the carbon plus nitrogen contents.

347 – 347 is a columbium/tantalum stabilized austenitic ss. Similar to 321, it has good intergranularcorrosion compared to typical 18-8 type alloys. It is widely used in aircraft exhausts, expansion joints and in high temperature chemical processing. It is resistant to atmospheric conditions and should be considered for applications requiring intermittent heating between 800F and 1650f.

Specifications: