316Lmod/724L, urea steel seamless pipe
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Equal grades: 316LMOD/1.4435/TP316LN/724L
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316Lmod--urea 316L modified grade has been specially developed for Urea plant applications
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It is a 316L modified stainless steel with extra-low silicone content and substantial higher molybdenum contents
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The low carbon content, combined with a well balanced chemistry (low silicone and nickel content close to 14%) makes the alloy fully austenitic, free of intermetallic phase precipitations
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The ferrite level is kept under 0.5% in the solution annealing and water quenched conditions
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The alloy is designed for improved corrosion resistance properties in urea- carbonate environments
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Typical maximum corrosion results required following different specifications after Huey tests (ASTM A262 C - five periods of 48 h.) are: maximum weight loss lower than 3,3 µm/48 h (ª 130 mg/dm² per 24 h.), with a maximum depth for micro cracks of 200 µm in the long direction and 70 µm in the transverse direction
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Test & inspection plan:
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100% PMI/spectro chemical analysis tests
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100% dimension tests & 100% visual examination
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Tension test, flaring tests (for seamless tube/pipe)/flange tests (for welded tube/pipe), hardness test, reversed flattening test (for welded tube/pipe), flattening test (for seamless tube/pipe)
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100% hydrostatic test/100% non-destructive tests
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Option test & inspection plan:
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Straightness test
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Roughness test
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Crystalline phase analysis
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Inter-granular attack tests
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Impact attack test under low temperature
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U-bend balling pass test u
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PT test on bending area
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Ultra-sonic testing
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Documents provided by Huaan International:
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A.MTC (material test certification) according to en10204/3.1 or en 10204/3.2
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Raw material certification
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All the test & inspection reports as per po and standards
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Heat treatment report
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Shipping notification before shipment
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Quality warranty letter
