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What is the difference between a steel pipe and a steel tube?

What is a steel tube? Steel tube can be divided into seamless steel tube and welded steel tube. Generally speaking, the outer diameter is less than 89 mm but the steel tube larger than 4 mm is referred to as the small diameter seamless steel tube. Seamless steel tube is a kind of hollow steel, with round, square and seamless rectangular shape. Seamless steel tube consists of steel ingot or solid tube, and then hot rolled, cold rolled or cold drawn seamless steel tube. Cross section, mainly used for conveying fluids. Compared with solid steel such as round steel, the […]

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How to choose a valve and valve end connection type

What is a valve ? A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. The word is derived from the Latin valva, the moving part of a door, in turn from volvere, to turn, roll. Valves are usually made of metal and they have several different parts. The outer part is called the seat and it often has a […]

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How to test pipe fitting?

Pipe Fitting Inspection & Testing During the manufacturing various Inspection & Testing are carried out on pipe fitting to ensure quality of the product. Hydrotest for Pipe Fittings Hydrostatic Test Not required for pipe fittings unless specifically requested by purchaser Code mandate that fittings shall be able to withstand under pressure required by applicable Piping Code. Most purchasers mandate, that a hydro tested pipe shell be used to manufacture fittings. Proof Test Brust Test Proof Test To qualified the design of the pipe fitting, manufacturer performed a various test including burst test to ensure that design will meet the all the […]

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WHAT IS NDT (Nondestructive Testing)?

WHAT IS NDT? Nondestructive Testing (NDT) plays an important role in assuring that structural and mechanical components perform their function in a safe, reliable, and cost-effective manner. NDT technicians perform the necessary tests to locate the indicators and discontinuities that may cause failures or shut downs in such systems. These tests are performed in a manner that does not affect the future usefulness of the object or material – hence, the name “nondestructive.” NDT allows for careful and thorough materials evaluation without the need for deconstruction or damage. NDT is typically used at various points in a part’s life cycle. […]

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Engineering Specification for Pressure Test of Piping System

This content provides you with a example specification for pressure test of piping system. This content is useful for field inspectors. 1. GENERAL – Pressure Test of Piping System 1.1.  SCOPE This specification covers the minimum requirements for pressure testing, draining and reinstatement of the piping system (A/G & U/G) in the construction works for use in industrial plants. Pressure test shall be a hydrostatic leak test, only where a hydrostatic leak test is impractical, pneumatic leak test may be substitute but it shall be subject to Owner’s prior approval. Lines and systems which are open to the atmosphere, such as drains, vents […]

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Tips for selecting expansion joints

An expansion joint or movement joint is an assembly designed to safely absorb the heat-induced expansion and contraction of construction materials, to absorb vibration, to hold parts together, or to allow movement due to ground settlement or earthquakes. They are commonly found between sections of buildings, bridges, sidewalks, railway tracks, piping systems, ships, and other structures. An expansion joint consists of a bellows (a kind of elastic element), a bracket, a flange and connectors at both ends, which is also a kind of compensating component. An expansion joint uses effective deformation of its bellows to compensate expansion and contraction of a pipeline and a […]

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Development trend of high pressure pipe fittings

With the rapid development of society and the impact of the high pressure pipe fittings under the promotion of our economy, we have also made a great impact. However, the pressure of competition in the market is also increasing. As a downstream industry in the food, drug processing and packaging industries, Increased benefits.   Now society is an era of information explosion, high-pressure pipe fitting manufacturer encountered in the product competition is inevitable, there is competition in the industry, but for some companies is actually a good thing. Because of competition, businesses improve product quality and service quality, and consumers […]

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What is a butt weld pipe fitting

What is a butt weld pipe fitting ? A butt weld pipe fitting is designed to be welded on site at its ends to connect pipes together and allow change in direction or pipe diameter, or branching or ending. This fitting then becomes part of a system for transporting fluids (oil, gas, steam, chemicals, …) in a safe and efficient manner, over short or long distances. Other types of fittings can be threaded or socket welded. Pipe Fittings are applied to connect two pipe ends together, to change direction or size of the pipes. There are many different types and […]

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How to Calculate a Pipe Bend?

Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe. Pipes and pipe fittings are made of a variety of materials, depending on the fluid or gas being transported. Most pipe fittings tend to be either threaded or able to slip over the pipes they connect. Whether you are using steel pipes of PVC pipes, a chemical solvent is required to create a seal between the pipe and the fittings. Measure the required length of the pipe to be installed, keeping in mind the extra length required where the pipe will be inserted […]

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What are Lap Joint Flanges?

We are manufacturer of Lap Joint Flanges and supply high quality Lap Joint Flanges in both large and small quantities worldwide and offer you the best prices in the market. The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face. This radius is necessary to have the flange accommodate a lap joint stub end. Normally, a lap joint flange and a lap joint stub end are mated together is an assembly system. Standards, Dimensions & Weight Standards:  ANSI, MSS, API, AWWA, DIN, JIS, BS and GB. Process:  free […]

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