Draka Specialty Tubing has been involved in bringing a number of technological advances to the industry, including a significant increase in the length of tubing manufactured without orbital welds.

DST offers:
• Alloy 316L seam welded and seamless pressure tubing
• Alloy 316L seam welded sheath tubing
• Alloy 825 seam welded and seamless pressure tubing
• Alloy 825 seam welded sheath tubing
• Alloy 2205 seam welded pressure tubing
• Alloy 625 seam welded pressure tubing
• Alloy 625 seam welded sheath tubing

Any of these is available as a TEC product.

With over a century of combined experience in the tube manufacturing business, these professionals ensure that DST’s customers receive customized, high-quality solutions to every tubing need.

Factory complex

DST operates from a complex of buildings totaling 80,000 square feet. Tubing is formed and gas-tungsten arc or laser beam welded from strip stock on multiple tube mills designed and fabricated by DST.

Sinking operation

Sinking is a cold working process in which tubing is pulled through a lubricated die without an internal plug. For certain tubing dimensions, manufacturing process limitations prevent welding the tubing to final size. In such cases, the tubing is welded at a larger outside diameter and sunk in one or more reduction / heat treatment operations. Sunk tubing may be heat treated or left in the cold worked condition to increase its strength.

Off-mill heat treatment

The tubing is heat-treated to achieve specified mechanical properties and corrosion resistance in an off-mill furnace with a reducing atmosphere.