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Yes, 3.2 certificates are available at an additional cost. We work with reputable third-party inspection agencies (TPI) such as BV, TUV, SGS, or LR, who will inspect the valves and issue signed certificates provided with the shipment.
Source: https://www.landee.cn/3-4-inch-hexagon-plug-astm-a105n-cl6000-npt.html