Explain: This series collects all kinds of connection forms and structural couplings, nipples, nozzles, rotary couplings, thermowells and other products in the automatic control instrument pipeline system. It is an essential connecting piece in the pipeline with a wide range of varieties, specifications and applications. Socket welded pipe joint YZG6 series is applicable to various measuring pipelines of automatic control system. The minimum nozzle is ∅15 and the maximum nozzle is ∅49.