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Hollow Wall Pipe series specifications
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Name（DN）
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300
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400
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500
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600
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700
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800
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900
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1000
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1200
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Length（M）
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8
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8
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8
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8
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8
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8
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8
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8
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8
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Pipe physical properties：
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Project
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Request
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Vertical retraction
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≤3%，Pipes should not hierarchical, without cracking
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By GB/T 6671-2001
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Oven Test
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Melting pipe joints should be no layering, no cracking
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By GB/T 6671-2001
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Pipe Mechanical Properties：
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Request
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Central stiffness/KN/m2
SN2
SN4
SN (63)
SN8
SN (125)
SN16
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≥2
≥4
≥6.3
≥8
≥12.5
≥16
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GB/T 9647-2003
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TIR≤10%
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GB/T 14152-2001
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Flexible ring
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Meet the standard requirements
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ISO 13968：1997
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≤4
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GB/T 18042-2000
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Linking the tensile strength
/N DN/ID≤300 400≤DN/ID<600 600≤DN/ID≤700 DN/ID≥800
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Melting joints can withstand the minimum tensile strength
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GB/T 8804.3-2003
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380
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510
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760
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1020
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Note : Add () is a non-preferred ring stiffness levels.
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