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By definition, seamless tubes are completely homogenous tubes, the properties of which give seamless tubing more strength, superior corrosion resistance, and the ability to withstand higher pressure than welded tubes. This makes them more suitable in critical applications in harsh environments, but it comes with a price.
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Stainless Steel Seamless Pipe Manufacturing
Knowing that distinction can also help in determining which tubing is best for a given application, welded or seamless. The method of manufacturing welded and seamless tubing is evident in their names alone. Seamless tubes are as defined – they do not have a welded seam. The tubing is manufactured through an extrusion process where the tube is drawn from a solid stainless steel billet and extruded into a hollow form. The billets are first heated and then formed into oblong circular molds that are hollowed in a piercing mill. While hot, the molds are drawn through a mandrel rod and elongated. The mandrel milling process increases the mold’s length by twenty times to form a seamless tube shape. Tubing is further shaped through pilfering, a cold rolling process, or cold drawing.
Stainless Steel Seamless Pipe Benefits
● Stronger
● Superior corrosion resistance
● Higher pressure resistance
Stainless Steel Seamless Pipe Applications
● Oil and gas control lines
● Chemical injection lines
● Below sea safety valves
● Chemical processing plant steam and heat trace bundles
● Fluid and gas transfer
Q1: What products does Jiuhe Steel mainly offer?
Jiuhe Steel specializes in carbon steel, stainless steel, copper, aluminum, color-coated and galvanized products. Our portfolio includes carbon steel coils/plates/pipes/sections, stainless steel coils/pipes/bars, copper plates/strips/pipes, aluminum plates/coils/profiles, pre-painted galvanized coils/roofing sheets, and galvanized coils/pipes/sections.
Q2: What standards do your products comply with?
We can supply products in accordance with various international standards, including GB/T (Chinese standard), ASTM (American standard), JIS (Japanese standard), EN (European standard), and others. We recommend that clients specify their required standards and grades, and we will arrange production accordingly. If you are unsure about the appropriate standard, our team can assist with standard comparison and material selection.
Q3: Do you offer customized products?
Yes. We provide customized steel and non-ferrous metal solutions based on specific project requirements, including special dimensions, materials, surface treatments, and more. Please send us your technical specifications or drawings, and we will offer professional advice and quotations.
Q4: How do you ensure product quality?
We maintain long-term partnerships with reputable domestic mills and processing plants, with strict quality control systems in place. All products are accompanied by quality inspection certificates issued by the manufacturer. Upon request, we can also arrange third-party inspection by agencies such as SGS or BV.
Q5: Do you provide Mill Test Certificates (MTC)?
Yes. We provide Mill Test Certificates (MTC) for each shipment, including product name, specifications, applicable standards, chemical composition, mechanical properties, test results, date of manufacture, and the manufacturer‘s official stamp.
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