Low pressure, medium pressure, high pressure welded threaded drilling mud from union FIG100 to FIG1502 series

Description :

  Union is a quick connect pipe fitting used in oil drilling, cementing, and fracturing operations, mainly to solve the problems of quick disassembly and sealing of high-pressure fluid transmission pipelines. This series of products covers various working conditions including low pressure, medium pressure, and high pressure. The typical working pressure range ranges from several thousand psi for low pressure to over 20000 psi for ultra-high pressure. It is suitable for the transmission of high wear media such as drilling mud and cement slurry. As the core component of the high-pressure drilling mud union, its design aims to ensure connection reliability under vibration and impact loads. Typical operating conditions include drilling rig risers, water hose connections, and fracturing truck manifold systems.

This series is manufactured strictly in accordance with API Spec 6A and related industry standards. The material is usually high-quality alloy steel and strengthened by heat treatment to withstand extreme working conditions. The specifications and models are complete, including low-voltage FIG100, FIG200, FIG206, medium voltage FIG400, FIG602, FIG1002, as well as high-voltage FIG1003, FIG1502, etc. There are two types of connection methods: welding and threaded connection. Welding is suitable for permanent pipeline connections and provides higher structural strength; The threaded type is convenient for on-site maintenance and replacement. The sealing surface is precision machined and matched with rubber or metal sealing rings to ensure no leakage under high pressure. Some high-pressure models, such as FIG1502 union, have a self tightening sealing structure, and the higher the pressure, the tighter the seal.

When selecting, it is necessary to match according to the actual working pressure, medium type, and connecting pipe diameter. The low-pressure FIG100/200 series is suitable for ordinary circulation pipelines, the medium pressure FIG400/602 series is commonly used for cementing operations, and the high-pressure FIG103/1502 series is specifically designed for ultra-high pressure scenarios such as fracturing. Welded union is suitable for situations that require compact space and do not require frequent disassembly, while threaded union is more suitable for nodes that require regular inspection and maintenance. Please note that different FIG numbers correspond to different pressure levels and external dimensions. It is strictly prohibited to mix different pressure levels of union components to avoid explosion accidents. When selecting high-pressure drilling mud unions, it is necessary to confirm the consistency between thread standards (such as NC, FH, etc.) and pipe wall thickness.

Before installing the union, it is necessary to thoroughly clean the sealing surface and threads, check whether the sealing ring is aged, cracked or missing, apply an appropriate amount of lubricating grease to reduce friction and assist in sealing. During use, the union body should be regularly inspected for deformation, cracks, or excessive wear, especially on the stressed parts of the high-pressure FIG1502 union. For threaded connections, a specialized wrench should be used to tighten to the specified torque to avoid over tightening causing thread slippage or over loosening leading to leakage. In daily maintenance, if scratches are found on the sealing surface, they should be repaired or replaced in a timely manner. When not in use for a long time, the union should be treated with rust prevention and stored in a dry place to extend the service life of the high-pressure union for drilling mud.

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