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ANSI B 16.5 Class 300 Weld neck flanges
A105 weld neck flange
steel weld neck flange
steel weld neck pipe flanges
A105 forged flange
class 150/300/600/900 forged flanges
GOST 12821 PN4.0 Weld neck flanges
GOST 12821 PN6.3 Weld neck flanges
GB/T 9115 PN15 Weld neck flanges
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