What is Vibration induce cracking

Vibration Induced Fatigue;  Vibration Induced Fatigue is a form of fracture due to fatigue, mechanical (of mechanical Fatigue) due to Dynamic load caused by vibration ( with Vibration) had done so at the risk of Vibration Induced Fatigue is a point there. High stress and severe shaking points. This type of damage is usually found at the small branch connections of Pressure Vessel and Piping, which are naturally high-stress points because they are discontinuous (see Stress Analysis) and are the receiving points. Vibrating force Thus, if the Support inadequate and the Small Branch Connection with Vibration ( for example, near … Continue reading What is Vibration induce cracking

Portable hardness test tools

There are several portable hardness testers available, with some more appropriate to certain situations than others. The particular hardness tester for the job would depend on what you needed to find out and why. For example, a Barcol hardness tester for use on Al alloys is generally used as a comparative tool; to indicate a loss in strength in damaged regions of a structure compared with undamaged regions or virgin material. Barcol hardness testers are very portable and are good for this type of comparative work, but the conversion to more widely recognized hardness scales is only approximate. Telebrineller testers. … Continue reading Portable hardness test tools

Make temporary flange for Hydro-test or Blind as ASTM A 694.

A specification for steel forgings such as ASTM A694 covers a wide range of strength grades from F42, with a minimum specified yield strength of 290 MPa, to F70, with a minimum specified yield strength of 485 MPa. The compositional limits are given in ASTM A694 (product analysis) are ≤0.3% carbon 0.13-0.37% silicon and ≤1.50% manganese. Additionally, the steel may contain micro-alloying elements, i.e. it may be a micro-alloyed (or high strength low alloy) steel; alternatively, Cr-Ni-Mo-V low alloy steel, ASTM A707 Grade L5, may be used. Particularly for small valves and thin section sizes, it may be expected that … Continue reading Make temporary flange for Hydro-test or Blind as ASTM A 694.

What is Piping Leak test

LEAK TEST Prior to initial operation, and after completion of the applicable examinations required by para. 341, each piping system shall be tested to ensure tightness. General Requirements for Leak Tests Requirements in para. 345.2 applies to more than one type of leak test. Preparation for Leak Test: 345.3  will be followed as below guide chart: How many Types of LEAK TEST? + Para 345.4 Hydrostatic Leak Test + Para 345.5 Pneumatic Leak Test + Para 345.6 Hydrostatic-Pneumatic Leak Test + Para 345.7 Initial Service Leak Test + Para 345.8 Sensitive Leak Test + Para 345.9 Alternative Leak Test Record: + Para 346 RECORDS Document refer ASME B31.3 – 2019 Continue reading What is Piping Leak test

Pump installation guides

The most important factor in ensuring a pump system offers a long service life is to get the installation right. No amount of good engineering, proper pump selection, or correct application of pumping technology can overcome the challenges a poor installation can throw at a pump system. So it’s critical that we all know the bare minimum requirements to ensure a good installation. Step 1: Read the Manufacturer’s Installation Instructions Virtually all pump manufacturer’s offer Operation and Maintenance Manuals (O&M’s). In addition to information on proper pump operation and maintenance these manuals usually also provide information on how to install … Continue reading Pump installation guides

Pump motor selection

It’s important to size an electric motor properly. Doing so will produce a pumping unit that is more efficient and provides a longer service life. Failing to size the motor correctly will result in a pumping unit that demands more power than it should or one that produces repeated electric faults and may suffer from premature motor failure. A Basic Introduction to Pump Motors Electric motors are generally sized at predetermined intervals. What this means is that in most cases you will need to round up to the next available motor size when determining how large a motor to couple … Continue reading Pump motor selection

Pump Curve Understanding

Years ago, making a pump selection meant sitting down with large printed catalogs and flipping through them until you reached a pump curve that fit a project’s hydraulic requirements. Today this process is made much easier through the use of electronic pump curve catalogs. One of the most well-known developers of electronic pump catalogs is Engineered Software and their pump selection software pump-flo. Another popular option for pump selection software is Intelliquip. All of the curves in this article were generated by Pump-Flo’s web-based pump selection software. What is a Pump Curve? A pump curve is a graphical representation of the performance … Continue reading Pump Curve Understanding

Centrifugal Pump Designs

In a previous article, we discussed some common impeller and casing designs. This article will consider what happens when you put the two together. End-Suction Pumps End-Suction Pump from Wikimedia Commons The most common centrifugal pump design is the end-suction pump. This type of pump combines a volute casing with a variety of impeller designs. Most typically, a radial flow impeller would be used, but in certain specialty applications, Francis-vane or mixed-flow impellers may be used. End-suction pumps are used in a large range of applications. Standard end-suction pumps are commonly used in fire suppression, plumbing, HVAC, and municipal water … Continue reading Centrifugal Pump Designs

Centrifugal Pump Structure

There are a few components that virtually every centrifugal pump has in common. These components include: An impeller A volute or diffuser style casing A shaft Shaft sleeves Bearings A sealing arrangement These parts can be subdivided into the wet end and the mechanical end. The wet end of the pump includes those parts that dictate the hydraulic performance of pump. The mechanical end includes those parts that support the impeller within the casing, seal the casing where the shaft passes through it and enable rotation – the means by which the wet end creates flow and pressure. Wet End We’ve already talked about the two primary … Continue reading Centrifugal Pump Structure