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| Customization: | Available |
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| Material: | Carbon Steel |
| Standard: | ANSI, DIN, GB, JIS, GOST, Bsw |
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| Description | The welding ring loosens the flange cover |
| Material | to order |
| Finish | sand blasting, polishing, plating, acid treatment, anodizing, coating |
| Special | Heat treatment / Passivating / engraving / black oxide coating / clear |