Welded Stainless Steel Steel Pipe End: square ends (straight cut, saw cut, and torch cut). or beveled for welding, beveled,
Welded Stainless Steel Pipe Packing: In Plywood Cases. Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleessve, and sackcloth with several steel strips, Plastic caps.
Welded Stainless Steel Pipe Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield
strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.
Mill Test Certificate: EN 10204/3.2
Third party inspection: SGS, BV, Lloyds etc.
TIG Welding Stainless Steel Tube
We manufacture ASTM A249 stainless steel welded tube using TIG (Tungsten Inert Gas) welding method, TIG welding can protect tube surface from oxidation, making welding bead integrity with base metal, and the same level, argon tungsten-arc welding usually is used for thin wall thickness stainless steel tube, and this welding type stainless steel tubes are suitable for heat exchanger system.
Annealed Pickling Stainless Steel Welded Tube
ASTM A249 welded tube should be annealed solution after welding, general Austenitic stainless steel heat treatment temperature from 1040 to 1150 degree Celsius, different grades have different annealing temperatures, this process can remove oxidation scale, plain grain structure and relieve stress, making tube soft and easy to fabricate, after annealing, ss tubes should be pickling in mixture of acid, removing scale and cleaning the surface, then passivation condition form a layer of oxidation film protecting tubes.
Bright Annealing Stainless Steel Welded Tube
Bright annealing (BA) finish is an another surface condition, it improve tube surface bright level and make surface more clean, a perfect additional requirement beside annealing passivation finishing.