Seamless Pipe and Tube Industry Insights and Guides
Duplex vs Super Duplex Stainless Steel Pipe: Grades, PREN and Key Differences
Compare duplex 2205 (S32205) and super duplex 2507 (S32750) stainless steel pipe by chemistry, PREN, specified strength, corrosion resistance, welding requirements and material selection.
VIEW DETAILS →Duplex Stainless Steel Seamless Pipes: Applications, Grade Comparisons, and Future Trends
Where duplex seamless pipes are used, how standard duplex UNS S32205 compares with super duplex UNS S32750/S32760 (PREN, chemistry, mechanical properties), and the market and technology trends shaping future demand.
VIEW DETAILS →GB/T 21833.3-2024 奥氏体-铁素体型双相不锈钢无缝钢管 第3部分：油气输送用管
中国国家标准：双相不锈钢无缝钢管（油气输送用）的牌号、性能与腐蚀验收要求。
VIEW DETAILS →GB/T 21833.2-2020 奥氏体-铁素体型双相不锈钢无缝钢管 第2部分：流体输送用管
中国国家标准：双相不锈钢无缝钢管（流体输送用）的牌号、性能与高温屈服强度。
VIEW DETAILS →GB/T 21833.1-2020 奥氏体-铁素体型双相不锈钢无缝钢管 第1部分：热交换器用管
中国国家标准：双相不锈钢无缝钢管（热交换器用）的牌号、性能与高温屈服强度。
VIEW DETAILS →ASTM B983 High-Strength Nickel Alloy Seamless Pipe & Tube Standard
Standard specification for precipitation hardened or cold worked, seamless nickel alloy pipe and tube
VIEW DETAILS →ASTM B829 Seamless Nickel Alloy Pipe & Tube Standard
Standard specification for general requirements for nickel and nickel alloy seamless pipe and tube
VIEW DETAILS →ASTM B729 Alloy 20 (UNS N08020) Seamless Pipe & Tube Standard
Standard specification for seamless uns n08020, uns n08026, and uns n08024 nickel-alloy pipe and tube
VIEW DETAILS →ASTM B704 Welded Nickel Alloy Tube Standard
Standard specification for welded uns n06625, uns n06219, and uns n08825 alloy tubes
VIEW DETAILS →ASTM B622 Nickel Alloy Seamless Pipe & Tube Standard
Standard specification for seamless nickel and nickel-cobalt alloy pipe and tube
VIEW DETAILS →ASTM B444 Inconel 625 (UNS N06625) Seamless Pipe & Tube Standard
Standard specification for nickel-chromium-molybdenum-columbium alloys (uns n06625 and uns n06852) and nickel-chromiummolybdenum-silicon alloy (uns n06219) pipe and tube
VIEW DETAILS →ASTM B423 Incoloy 825 (UNS N08825) Seamless Pipe & Tube Standard
Standard specification for nickel-iron-chromium-molybdenum-copper alloy (uns n08825, n08221, and n06845) seamless pipe and tube
VIEW DETAILS →ASTM B407 Incoloy 800/800H/800HT Seamless Pipe & Tube Standard
Standard specification for nickel-iron-chromium alloy seamless pipe and tube
VIEW DETAILS →ASTM B167 Inconel 600/601/690 Seamless Pipe & Tube Standard
Standard specification for nickel-chromium-iron alloys (uns n06600, n06601, n06603, n06690, n06693, n06025, n06045, and n06696), nickelchromium-cobalt-molybdenum alloy (uns n06617), and nickel-iron-chromium-tungsten alloy (uns n06674) seamless pipe and tube
VIEW DETAILS →ASTM B165 Monel 400 (UNS N04400) Seamless Pipe & Tube Standard
Standard specification for nickel-copper alloy (uns n04400)* seamless pipe and tube
VIEW DETAILS →ASTM B163 Nickel Alloy Condenser & Heat Exchanger Tube Standard
Standard specification for seamless nickel and nickel alloy condenser and heat-exchanger tubes
VIEW DETAILS →ASTM B161 Nickel 200/201 Seamless Pipe & Tube Standard
Standard specification for nickel seamless pipe and tube
VIEW DETAILS →ASTM A999 Seamless & Welded Stainless Steel Pipe Standard
Standard specification for general requirements for alloy and stainless steel pipe
VIEW DETAILS →ASTM A790 Duplex Stainless Steel Pipe Standard
Standard specification for seamless and welded ferritic/austenitic stainless steel pipe
VIEW DETAILS →ASTM A789 Duplex Stainless Steel Tube Standard
Specification for seamless and welded ferritic/austenitic stainless steel tubing
VIEW DETAILS →ASTM A312 Seamless & Welded Stainless Steel Pipe Standard
Standard specification for seamless, welded, and heavily cold worked austenitic stainless steel pipes
VIEW DETAILS →ASTM A270 Seamless & Welded Stainless Steel Standard
Standard specification for seamless and welded austenitic and ferritic-austenitic stainless steel sanitary tubing
VIEW DETAILS →ASTM A269 Seamless & Welded Stainless Steel Tubing Standard
Standard specification for seamless and welded austenitic stainless steel tubing
VIEW DETAILS →ASTM A249 Welded Stainless Steel Tube Standard
Standard specification for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes
VIEW DETAILS →ASTM A213 Seamless Stainless Steel Tube Standard
Standard specification for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes
VIEW DETAILS →ASTM A1016 Standard
Standard specification for general requirements for ferritic alloy steel, austenitic alloy steel, and stainless steel tubes
VIEW DETAILS →BS EN 10216-5:2021 Standard For Seamless Stainless Steel Tubes
Seamless steel tubes for pressure purposes - technical delivery conditions - part 5: stainless steel tubes
VIEW DETAILS →BS EN 10216-4:2013 Standard For Seamless Steel Tubes
Seamless steel tubes for pressure purposes - technical delivery conditions - part 4: non-alloy and alloy steel tubes with specified low temperature properties
VIEW DETAILS →BS EN 10216-3:2013 Standard For Seamless Steel Tubes
Seamless steel tubes for pressure purposes - technical delivery conditions - part 3: alloy fine grain steel tubes
VIEW DETAILS →BS EN 10216-2:2024 Standard For Seamless Steel Tubes
Seamless steel tubes for pressure purposes - technical delivery conditions - part 2: non-alloy and alloy steel tubes with specified elevated temperature properties
VIEW DETAILS →BS EN 10216-1:2013 Standard For Seamless Steel Tubes
Seamless steel tubes for pressure purposes - technical delivery conditions - part 1: non-alloy steel tubes with specified room temperature properties
VIEW DETAILS →PROCESS FLOW CHART OF SEAMLESS STAINLESS STEEL PIPES
Step-by-Step Stainless Steel Seamless Pipe Manufacturing Process All the steps have been explained in detail below — follow the process flow from the raw round bar to the final marked pipe. Every seamless stainless steel pipe we produce passes through 20 controlled manufacturing steps, each with its own inspection or quality checkpoint, so that the finished product arrives weld-seam free, dimensionally accurate and traceable. Request a Quote Process Flow at a Glance Round Bar→Re-inspection→Cut to Length→Centering→Peeling→Heating→Piercing→Inspection→Grinding→Pickling→Drying→Cold Drawing / Rolling→Degreasing→Heat Treatment→Straightening→Fixed Length Cutting→Passivation→Final Inspection→Marking 1 Round Bar Selection This is the first step towards manufacturing seamless products at Xintongda. We select…
VIEW DETAILS →Why 304 Stainless Steel Pipes Dominate the Global Market: A Technical & Economic Analysis
In the modern industrial landscape, AISI 304 stainless steel (UNS S30400) is the undisputed “King of Usage.” Whether it is for high-precision sanitary tubing, industrial heat exchangers, or architectural structural components, the 304 grade remains the industry standard. But what specific properties make this Austenitic stainless steel the “Hexagon Warrior” of materials? Below, we analyze the technical and economic factors driving its global dominance. 1. The “Golden Ratio” of Chemical Composition The performance of 304 stainless steel is rooted in its chemistry, specifically the 18/8 ratio (18% Chromium and 8% Nickel). 2. Exceptional Fabricability and Weldability One of the primary reasons for the widespread adoption of…
VIEW DETAILS →Incoloy vs Inconel: Key Differences Between Two Nickel Alloy Pipes
Incoloy vs Inconel: Key Differences Between Two Nickel Alloy Pipes In high-temperature and corrosive industrial environments, choosing the correct nickel alloy pipe material is essential for ensuring long service life and system safety. Two of the most widely used nickel-based alloys are Incoloy and Inconel. Although both alloys belong to the family of nickel-based austenitic superalloys, their chemical compositions, mechanical performance, and industrial applications differ significantly. Understanding the difference between Incoloy and Inconel pipes helps engineers select the best material for industries such as oil & gas, petrochemical processing, aerospace, marine engineering, and power generation. What Is Inconel? Inconel is a family of nickel-chromium-based superalloys known for their exceptional resistance to extreme heat,…
VIEW DETAILS →PREN Calculator (Pitting Resistance Equivalent Number)
Compute the pitting resistance equivalent number from Cr, Mo, W and N to compare stainless, duplex and nickel alloy corrosion resistance.
VIEW DETAILS →Stainless Steel Pipe & Tube Pressure Burst Calculator
Calculate pipe and tube burst pressure with Barlow's formula and selectable safety factors for stainless, duplex and nickel alloy tubing.
VIEW DETAILS →Pipe Wall Thickness Calculator (ASME B31.3)
ASME B31.3 minimum wall thickness for seamless and welded pipe under internal pressure, including corrosion allowance and weld factors.
VIEW DETAILS →Stainless Steel Pipe & Tube Weight Calculator
Get kg/m from outer diameter, wall thickness and grade density for SS304, 316L, duplex and nickel alloy pipe and tube.
VIEW DETAILS →Grade Index (Stainless, Duplex & Nickel Alloy Equivalents)
Look up any stainless, duplex or nickel alloy grade by UNS, EN W.Nr., JIS, GB/T or trade name and instantly get its equivalent designations - 93 grades, cross-checked October 2026.
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