Shiwei Industry And Trade Group Co., Ltd.
Shiwei Industry And Trade Group Co., Ltd.
Products

Liquid treatment stainless welded tube

In modern liquid handling systems, the backbone of reliable infrastructure often depends on the integrity of piping materials. Our facility specializes in Water processing stainless welded steel tube engineered to withstand aggressive media and high-pressure cycles. The fusion of precision welding and premium-grade stainless alloys ensures these components resist pitting, crevice corrosion, and microbial colonization. Engineers tasked with designing reverse osmosis plants, chemical dosing skids, and thermal hydrolysis units consistently specify our Water treatment grade stainless steel tubing for its consistent wall concentricity and certified surface finishes. Every length of Welded stainless pipe for water purification we deliver passes eddy current and hydrostatic testing, ensuring zero leakage in critical separation processes. For broader ecosystem management, our Aquatic treatment stainless welded conduit offers robust conveyance for both potable reservoirs and sensitive aquaculture environments, maintaining purity under fluctuating temperatures and flow velocities.


AquaFlow LDX-9000 welded stainless tubing represents the culmination of metallurgical refinement and automated manufacturing. The product is cold-formed and longitudinally welded using a tungsten inert gas process without filler metal, preserving the corrosion-resistant oxide layer. Subjected to bright annealing in a controlled hydrogen atmosphere, the tubing achieves a Rockwell B hardness range suited for orbital welding on-site. The internal bead is precisely controlled to a maximum height of 0.1 mm, virtually eliminating entrapment zones where biofilms or particulate matter could accumulate. Below is a detailed breakdown of the dimensional tolerances and mechanical properties that define its operational envelope.

  • Outer Diameter Range: 6.00 mm to 76.20 mm with a tolerance of ±0.08 mm
  • Wall Thickness Range: 0.80 mm to 3.00 mm with a tolerance of ±10%
  • Standard Length: 6 meters, with optional cut-to-length services down to 10 mm sections
  • Surface Roughness: Internal Ra ≤ 0.8 μm as measured per ISO 4287
  • Weld Seam Integrity: 100% inline eddy current inspection to detect sub-surface flaws
  • End Finish: Square cut, deburred, and capped with plastic protectors
  • Marking: Continuous inkjet printing with heat number, size, and material grade
ParameterSpecification
Material Grade316L (UNS S31603) dual-certified with 1.4404
Yield Strength≥ 205 MPa at 0.2% offset
Tensile Strength≥ 515 MPa
Elongation≥ 35% in 50 mm gauge length
HardnessMaximum 90 HRB
Pressure RatingCalculated per ASME B31.3 using a safety factor of 4:1
Heat TreatmentSolution annealed at 1040°C followed by rapid quenching
Intergranular CorrosionPasses ASTM A262 Practice E without sensitization
CleanlinessUltrasonically cleaned and capped in a Class 5 cleanroom
CertificationsEN 10204 3.1 material certificate, FDA 21 CFR 175.300 compliant

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