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Welded & Drawn Stainless Steel Tubing

Welded & Drawn Stainless Steel Tubing

Welded and drawn is the preferred tubing choice in terms of economy, lead time, and tolerancing when compared to seamless in most instances. Many demanding applications call for the T.I.G. welded and plug (mandrel) drawn method, used by Vita Needle for over 90 years! Straight lengths available for same day shipping on stock sizes and fast lead times make us ideal for prototype and production runs.

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Why Choose Vita Needle?

Lowest Minimums in the industry and competitive pricing

Ship Same Day of Order Placed In-stock random lengths - typically ship same day of order if placed before 1pm EST

Unlisted Non-Standard Sizes Hundreds of thousands of feet of unlisted non-standard sizes in stock

Custom Tubing Custom tubing you need---cheaper, faster and better than the others

Welded and Drawn Production Process

Over the decades, experience has readily demonstrated that a more forgiving weld zone and no filler metals produce an optimum fabrication grade material. Vita's TIG welded and plug-drawn process yields a consistent, dependable product. Competing processes such as laser welding have several disadvantages when compared to TIG welding. The parameters of the laser weld process require extremely precise strip stock and very tight manufacturing constraints, deviations from which can result in the insufficient weld and subsequent weak points in the tube. One micro-defect at strip edge could potentially translate into a defective tube. By comparison, TIG welding is a more generous manufacturing process, allowing a slight imperfection in raw material to join equally well in the weld zone. Manufacturers of laser-welded tubing often perform the welding very close to final sizing. This may seem like an economical advantage, but without adequate cold work from drawing over a floating plug, some undesirable results can arise: a) total homogenization of the weld zone into the base metal may not be achieved, b) a relatively rough I.D. surface can lead to cleanliness problems, and c) uniform hardness and exacting tolerances are not possible.

Concentricity of welded tubing for hypodermic needles is far superior to seamless. An as-welded laser tube (without plug drawing) will generally have worse concentricity compared to a TIG welded and drawn product because the weld seam sags slightly into the ID of the tube even if only by ten-thousandths of an inch. When applications demand fine finishes, such as laboratory sampling and blood analyzers, Vita can produce premium ID finishes using double and even triple plug draws.

Thin Wall Tubing
Welded & Drawn Tubing

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