說明：
    本系列收集了自控儀表管路系統中各種連接形式和結構式管接頭、短節、管嘴、轉管接頭溫度計套管等產品，品種多、規格全，適用廣，是管路中必不可少的連接件。壓力表接頭YZG12系列是一種應用很廣泛的接頭，只要有壓力表，就有YZG12系列的接頭。YZG12系列接頭制造材料要與管道材料相同或高于管道材料，常用的標準件的材質是20號鋼、1Cr18Ni9Ti、316和316L，選用時要高選一檔。溫度適應范圍大，通常T≤800°C，它能正常使用。

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.Pressure gauge connector YZG12 series is a widely used connector.As long as there is a pressure gauge,there are YZG12 series connectors.The manufacturing material of YZG12 series joints shall be the same as or higher than the pipe material.The commonly used standard parts shall be made of 20# steel, 1Cr18Ni9Ti, 316 and 316L,and shall be selected at a higher level.The temperature can adapt to a wide range, usually T≤800°C, and it can be used normally.

性能規范：
□公稱壓力：1.0MPa～3.2MPa
□適用溫度：-70℃～+450℃
□制造材料：20#,H62,1Cr18Ni9Ti,316L,0Cr18Ni12Mo2Ti
□執行標準：《儀表工手冊》樂嘉謙著 第五篇 儀表安裝>>第三章 儀表加工件>>第一節 儀表接頭