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。活接頭YZG15系列是自控系統的輔助接頭之一，適用于各種測量、信號和氣源管路上。活接頭主要用于較長的管路和安裝多臺設備的管路上，用活接頭的原因是便于安裝和維修。活接頭常用在管徑較小的管道上(大管徑采用法蘭連接)，多用在DN15～40。作為系列產品，其管徑從DN15一直到DN70。通常DN＞50就不用活接頭了。
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. The union YZG15 series is one of the auxiliary connectors of the automatic control system, which is applicable to various measurement, signal and air source pipelines. Unions are mainly used for long pipelines and pipelines where multiple equipment are installed. The reason for using unions is to facilitate installation and maintenance. Unions are usually used on pipes with small pipe diameters (flange connection is used for large pipe diameters). They are usually used in DN15～40. As a series of products, the pipe diameter is from DN15 to DN70. Usually, the union is not used when DN>50.
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
