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pup joints, features, specifications, application

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pup joints, features, specifications, application
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Specifications of Perforated Pup Joint

Date:2025-01-08View:261Tags:pup joints, features, specifications, application

The perforated pup joints are pipe fittings used in a pipeline system, which mainly realizes specific functions through holes on the pipe wall. In the pipeline system, it can make the fluid in the pipeline be diverted, sampled, injected with additives or connected with other pipelines or equipment at a specific location. For example, in chemical production, catalysts or other chemicals can be quantitatively injected into the main pipeline through the holes on the perforated pup joint to meet the requirements of the production process.


Structural features

The perforated pup joint is generally a short tube with a relatively short length, which is usually significantly shorter than the length of ordinary pipelines. It has specific connection structures at both ends, such as threaded connection, flange connection or socket connection, so as to make reliable connection with other pipelines or equipment.

There are one or more holes on the pipe wall. The size, number and position of these holes are determined according to the actual use requirements. The shape of the hole is generally circular, but other shapes are used in special cases.


Specifications

In the complex pipeline system in the industrial field, the perforated pup joint is a key connector. Although it is small in size, it plays an indispensable role. Different engineering scenarios have different requirements for perforated pup joints. The precise control of their specifications and parameters is directly related to the stable operation, safety and service life of the entire system. The following is a summary of the specifications of common perforated pup joints:

Item

Specifications

Nominal diameter

1/2 inch, 3/4 inch, 1 inch, 1.5 inch, 2 inch, 2.5 inch, 3 inch, 4 inch, etc.

Length

6 inch, 8 inch, 10 inch, 12 inch, 18 inch, 24 inch, etc.

Pressure rating

150 pound class (about 2.1MPa), 300 pound class (about 4.2MPa), 600 pound class (about 8.4MPa), 1500 pound class (about 21MPa), 2500 pound class (about 35MPa), etc.

Thread specifications

American: NPT 1/2, NPT 3/4, etc.

British: BSPT 1 inch, BSPT 1.5 inch, etc.

Special thread: airtight thread, etc.

Material

Carbon steel: Q235, 20# steel, etc.

Stainless steel: 304, 316, 316L etc.

Alloy steel: chromium-molybdenum alloy steel, etc.


Application areas

1. Petrochemical industry

In the process of petroleum refining and chemical production, perforated pup joints are widely used in various fluid conveying pipeline systems. For example, on the feed and discharge pipelines of the reactor, they are used to add raw materials, take samples for analysis, etc.

2. Natural gas industry

In the process of natural gas extraction, transportation and processing, perforated pup joints can be used to install pressure sensors, flow metering devices, etc., so as to monitor and control the relevant parameters of natural gas.

3. Water treatment industry

In the water treatment system, perforated pup joints can be used to add flocculants, disinfectants and other chemical agents into the pipeline to purify the water quality. It can also be used to extract water samples from the main pipeline for water quality testing.

4. Heating and cooling system

In the central heating or central air-conditioning system, perforated pup joints can be used to connect branch pipelines to achieve the distribution of heat or cold. It can also be used to install instruments such as temperature sensors and pressure gauges to monitor and adjust the operating parameters of the system.


Summary

In short, perforated pup joints play a vital role in many industries with their unique structural design and rich and diverse specifications. Accurately selecting suitable perforated pup joints can not only ensure the efficient and stable operation of various pipeline systems and meet the complex and changing production process requirements, but also effectively improve the safety and reliability of the system and reduce potential failure risks.