What Causes Metal Bellows Expansion Joint Failure

Metal bellows expansion joints of our company have been properly designed and produced to apply in various piping systems. However, failures of metal bellows expansion joint have occurred, users and metal bellows expansion joint manufactures both are possible causers. Although metal bellows expansion joint failures can occur for many reasons, Lanphan’s rich experiences has concluded several certain typical causes of failure as below.

Metal Bellows Expansion Joints

1. Incorrect installation method and insufficient protection measure for the metal bellows expansion joint.

2. Something you do during and after installation. For instance:

Joints with internal liners installed in the reverse direction with respect to flow;

Installing a metal pipe expansion joint in a location other than as prescribed by the installation drawings;

Premature removal of shipping devices;

Springing of metal bellows expansion joint to make up for piping misalignment;

Insufficient protection from mechanical damage due to work in the surrounding area; Insufficient protection of bellows during nearby welding operations and failure to remove shipping devices before placing system in operation.

3. Exceed pressure of the system (in-service or hydro test) and bellows vibration (mechanical or flow induced resulting in high cycle fatigue)

4. Metal bellows expansion joints erosion and torsion.

5. Packing of particulate matter in the bellows convolutions which inhibits proper movement of the bellows.

6. Shipping and handling damage. For instance:

Denting or gouging of bellows from being struck by hard objects (tools, chain falls, forklifts, adjacent structures, etc.);

Improper stacking for shipping or storage;

Insufficient protection from weather or other adverse environmental conditions.

7. Improper anchoring, guiding and supporting of the system.

8. Internal and external metal bellows expansion joints corrosion.

9. Excessive bellows deflection, that is axial, lateral, angular deflections greater than design values.

10. Also anchor failure in service.

Looking for High Quality Suppliers of Stainless Steel Bellows

Are you looking for high quality suppliers of stainless steel bellows? Let Henan Lanphan help you to find one. As a China stainless steel bellows supplier with 30-year experience, we value two things when choosing suppliers of stainless steel bellows. One is product quality, the other is service.

Good quality can tell things. Stainless steel bellows are used to compensate movements and absorb pipe thermal deformation, its major applications covers industries of petroleum, chemical engineering, nuclear energy, power plant, water treatment... Lanphan is a stand-out supplier of stainless steel bellows in China market, our product has excellent pressure-resistant properties, large compensation amount, good temperature-resistant properties and long working life.

stainless steel bellows suppliers

But to be honest, there are not much difference on product quality among so many suppliers of stainless steel bellows, what matters more is service. Henan Lanphan provide complete pre-sale, in-sale and after-sale service during the whole transaction. Lanphan technicians will offer rationalization proposals to assist you to select proper types, 24-hour online service is available in our company, professional quotation information usually is provided to customers within a day.

During the manufacturing process of stainless steel bellows, stainless steel bellows supplier Lanphan will provide product inspection record of key junctures, and production schedule photos to customers. Once you received the stainless steel bellows, you can enjoy one-year warranty period in condition of correct installation, normal maintenance and operation. When warranty period has expired, the stainless steel bellows enjoys lifetime guarantee repair, we only charge cost price for changing standard component and sealing component. Also lifelong free technical support is provided in Henan Lanphan.

Henan Lanphan is a China stainless steel bellows supplier, we sell bellows compensator, rubber expansion joints, metal expansion joints, pipe fittings, metal hoses and so on. If you are looking for stainless steel bellows suppliers, give us a chance to serve for you. Email us at best@lanphan.com.

How to Custom-Made the Rubber Flanged Bellows Expansion Joint?

Rubber flanged bellows expansion joints are differed in rubber material, flange material, connection methods and rubber sphere quantity... These models apply to different application sites. Do you know how to custom-made the rubber flanged bellows expansion joints according to the specific working condition? The most important thing is figure out following questions:

rubber flanged bellows expansion joints

How many rubber sphere do you need? The options are single sphere, double sphere, triple sphere and multiple sphere rubber flanged bellows expansion joints.

What forming process do you prefer? Mould pressing or hand-built spool type?

What’s the installation length of rubber expansion joint? You need to calculate the distance between two pipelines that need to be connected.

What’s the working pressure of rubber expansion joint? From PN0.25 to PN3.0 or more.

What’s the flowing media within pipeline? Commonly seen medium including drinking water, waste water, seawater, hot steam, petroleum, limestone slurry, hydrochloric acid, sulfuric acid, pulp, etc..

What’s the working temperature of rubber flanged bellows expansion joint? Select form -40℃ to 180℃.

What’s the flange material? Choosing from Q235, SS400, St37.2, A105, SS304, SS316, SS310, S321, casting, steel or ductile cast iron.

What’s the flange standard? Choosing from ANSI B16.5, DIN2501, ISO7005.1, ISO7005.2. BS4504, EN1092, JIS, etc..

What’s the rubber material of rubber expansion joint? Choosing form NR, CR, NBR, EPDM, IIR, FKM, PMQ, GAS and so on.

What material do you prefer for the reinforcement layer? Cord fabric or steel wire?

Other requirements should also be clarified: the location of reinforcement ring, vacuum degree, whether requires limit rod, number of limit rods, whether requires buried protective device, whether requires colored tape and other special requirements.

Please list above answers before make an enquiry, it helps us quickly calculate the price for you. Kindly send the inquiry to best@lanphan.com

How to Extract Cannabis by A Rotary Evaporator?

Cannabis processors are no need to look for highly sophisticated techniques for cannabis production, all they need is a rotary evaporator, which established in market since 1950. This post is a brief guide on how to extract cannabis by a rotary evaporator.

A rotary evaporator is a scientific instrument used to remove solvents under vacuum. Whether you need bench type(1L to 5L) for small lab or pilot scale(20L or up) for mass production, there always one type suit for you.

ow does rotary evaporator cannabis production works?

As we talked about before, vacuum pump and chiller are the essential corollary equipment for a rotary evaporator. During the cannabis extraction process, the vacuum pump is applied to reduce pressure, the to be removed solvent, rotovap ethanol ’s boiling point is lowered in this case. Normally we fill a half of the volume to the rotary flask , the water bath is heated to 30℃ to 40℃. The chiller is used to reduce temperature for the glass condenser , ideal temperature setting is from -10℃ to 0℃. Then set the rotating speed from 150rpm to 200rpm, and a thin film is created on the upper surface of glass cylinder, it efficiently increase reaction area and so that evaporation rate is enhanced. To get the solvents you want, set the vacuum to achieve an rotovap ethanol vapor temperature of 15℃ to 20℃. During the process of rotovap ethanol evaporation, it will be condensed and collected into a receiving flask at the bottom.

Because cannabis extraction requires lower water bath temperatures to minimize thermal decomposition, a chiller is essential to cool the condenser to -10℃ to 0℃, processors require a chiller with adequate cooing capacity.

Using a rotary evaporator to produce cannabis is a simple and easy method, Lanphan has all the instrument you might need, chiller, vacuum pump, and all kinds of rotovaps. Selecting your favorite one and begin your business today. Contact rotovap@lanphan.com

All About Metal Expansion Bellows

The metal expansion bellows actually is a kind of piping connector with good flexibility and high strength. It is the essential connection equipment in piping systems, playing function of thermal expansion absorption and movement compensation.

The metal expansion bellows are various in shapes and materials, round or rectangular, single bellows or double bellows, flanged connection or welded connection, carbon steel or stainless steel, selecting depends on application diversity. Let’s see several frequently asked question about metal expansion bellows.

metal expansion joint

Question One: what signs indicate metal expansion joint failure?

Typically there are welding failure, medium leakage, bellows deformation that indicate the metal expansion joint needs to be inspected or replaced. Some users don’t treat it seriously when handling metal expansion joint failures, it’s non advisable because “a little leak will sink a great ship”, safety always comes first.

Question Two: what may cause metal expansion joint failure?

Improper installation method is the most common type that cause damage to metal expansion bellows. For instance, installing the metal expansion bellows in wrong direction or wrong location, of course it will fail. Or the metal expansion joint failure is caused by shipping or handling damages, possible causes like wrong stacking of packages, being struck by hard objects( like adjacent structures, hard tools, chain falls, etc.), insufficient protection from bad weather, even dropping from high place.

Question Three: what is a metal expansion bellows and what is a bellows?

Typically a bellows is the major component for metal expansion bellows, it is used to make an expansion joint. And a finished metal expansion bellows must composed of bellows and other end fittings to enable it connect to pipelines.

Question Four: what’s the difference between metal expansion bellows and metal flexible hose?

The metal bellows is designed for compensating movements in three directions: lateral, angular and axial, the product itself has strong strength and no need of braiding steel wire to enhance strength; while a flexible metal hose is designed for lateral offset, it is not applicable for extension or compression. It always require a braided steel wire to enhance strength so as to handle pressure.

Above is the possible signs of metal expansion joint failure and explained what causes the failure. If you are interested in our product, please email to best@lanphan.com.

New to Stainless Steel Metal Bellows? You Must Read This Post

Are you new to stainless steel metal bellows? Don’t worry, the purpose of this post is to help beginners get a overall view of stainless steel pipe bellows. Before you get started with stainless steel pipe bellows, it’s important to know some basic facts.

stainless steel metal bellows

What are stainless steel metal bellows?

The stainless steel pipe bellows looks like a metal spring in shape, it is an elastic component that use its characteristic of flexibility to absorb vibration by thermal expansion in pipeline systems. Due to its good flexibility, it will back to original shape if the pressure is off.

What industry does stainless steel pipe bellows apply to?

What industry does a stainless steel pipe bellows apply to? In other words, what are stainless steel metal bellows used for? It has a wide application range that covers almost all works of life, but one thing you must be aware is, each metal bellows in different type is designed for its unique working environment considering of temperature, pressure, corrosion or movements. Common application industries include petrochemical, chemical engineering, pharmaceutical, power generation, mining, paper making, waste water treatment, etc..

How many accessories composed of a stainless steel metal bellows?

An elastic bellows is the major component for a stainless steel metal bellows, besides, other accessories is also important to it. Some metal bellows are installed with two tie rods to restrain full pressure thrust, but it only applicable for lateral movements. And control devices are used to restrict or distribute movements during typical application. Hinges restrict movement to angular only. A guide liner is designed to prevent abrasive or corrosive flowing medium from hurting the inner surface of bellows. In the same way, a cover is used to protect the external surface of bellows, efficiently prevent welding spatter, mechanical damage and so on.

How to connect the stainless steel pipe bellows to a pipe?

Basically there are two connection ways. The most commonly used is flange connection, different flange standards are selected to fit with piping in worldwide areas. Our stainless steel pipe bellows support ANSI, JIS, DIN, etc. All flanges can be made from stainless steel, carbon steel, or other material as you request. And floating flange is available. Another connection way is welding, it takes more time on installation than flange connection. Stainless steel or alloys can be freely choose as you request.

If you are new to stainless steel metal bellows, I hope this post will be a good start for you. Contact us today for latest catalog and price list! Email: best@lanphan.com

How to Make Cord Fabric for Flexible Rubber Expansion Joint?

As we known that flanged rubber expansion joint has good elasticity, but only use rubber material can not bear high pressure and high strength. In order to prompt the strength of flexible rubber expansion joint, flanged rubber expansion joint manufacturer always insert cord fabric inside the rubber sphere.

With the cord fabric, a flanged rubber expansion joint has much tenacity and strength, now let Lanphan tell you how to make cord fabric for flexible rubber expansion joint.

There are five requirements for cord fabric: high strength and high initial modulus; heat resistant; fatigue resistant; stable structure; could be bonded with rubber.

rubber expansion joint cord fabric

The first step is rubber material selection, usually we don’t use natural rubber, because it doesn’t need a large amount of rubber, so generally we use the rest of rubber material that left by spool flexible rubber expansion joint. It’s material-saving and has the same effect with natural rubber.

The second step is wire selection. There are so many choices of wire, cotton tire cord, chinlon cord thread, steel wire cord thread, nylon cord thread, carbon fiber cord thread and so on. Cotton tire cord is low in strength, and need multiple layers to produce. In general, we often use chinlon cord thread since it has high strength.

Factory workers adhere the cord fabric to rubber sheet by hand, they use tools to tightly press the cloth to rubber, make sure no air bubble inside the rubber sheet. The flanged rubber expansion joint is our featured product, we have more than 30 years’ experience on flexible rubber expansion joints production and sales. The rich sales experience make us popular in market, our flexible rubber expansion joint has various styles: single sphere, double sphere, multiple sphere, flange connection, thread connection, clamp connection, also could be lined with teflon material to further prevent corrosion.

Should you have any enquiry request or just want to consult some technical question, please email to us at best@lanphan.com or call us at 86-371-67447999.

Give Me 5 Minutes to Introduce You What is Dresser Pipe Coupling

The dresser pipe coupling, style 38 coupling or mechanical coupling is the model of SSJB steel expansion joint at Henan Lanphan. What is dresser pipe coupling? We will tell you the answer from its feature, category, application and package.

step coupling

What’s the feature of dresser pipe coupling?

Lanphan SSJB mechanical coupling is made up pf sleeve, sealing rubber ring, follower and some other components. It has the similar function with rigid coupling, mechanical coupling connects two pipes without flange or welding, just screw its nuts and bolts and rubber sealing ring plays function of prevent leakage.

What’s the application of dresser pipe coupling?

SSJB mechanical coupling can be applied for water and gas pipelines, but please note that when it applies to gas pipeline, it can’t bear high pressure. Users can use the mechanical coupling for both underground and outdoor working environment.

What’s the category of dresser pipe coupling?

Classified by whether concentric, the mechanical coupling can be divided into concentric and eccentric(step coupling) type.

Classified by manufacturing material, it can be divided into ductile iron, stainless steel and carbon steel. Among which the carbon steel mechanical coupling can be divided into two types, the difference is the Follower, left photo Follower is similar with welded neck flanges; right photo Follower is similar with slip on flanges, the thickness is larger than left photo's, their function basically the same, can replace each other.

carbon steel mechanical coupling

How to pack dresser pipe coupling?

SSJB dresser pipe coupling often be packed by non-fumigation wooden case or iron frame. But if the quantity is large, the dresser pipe couplings can be package in separately. All the sleeves will be packed into the wooden case, and there will be one layer of wooden piece among every layer, which will protect the painting. Followers is packaged by steel frame since it has heavy weight, and each follower will be protected by plastic films. There will be bubble films to protect the outside.

Our company has signed a 2000-piece SSJB mechanical coupling contract in 2016, the goods were delivered successfully and customers think highly of the products. For enquiry, please send it to best@lanphan.com, we’ll reply you ASAP.

Working Principle of Dismantling Joint Coupling and Expansion Joint

Expansion joint and dismantling joint coupling are similar in appearance, many people will confuse them at first time. Today we introduce you the working principle of dismantling joint coupling and expansion joint.

Expansion joint and dismantling joint are widely used in modern pipeline to connect pump and valves to piping. Commonly seen models of dismantling joint coupling includes VSSJAF double flange dismantling joint coupling, VSSJAFG single flange dismantling joint and VSSJAFC detachable double flange dismantling joint. Commonly seen models of expansion joint includes VSSJA flange adaptor, VSSJA-1 single flange limit expansion joints, BSSJA-2 double flange limit expansion joints and SSJB mechanical pipe coupling.

In appearance, the biggest difference of dismantling joint and expansion joint is whether the bolts extrude the flange end face. In general condition, if bolts extrude the flange face, it most likely the dismantling joint coupling; and if not extrude the flange face, it most possibly the expansion joint. Do you know what is the working principle of dismantling joint and expansion joint?

What’s the working principle of expansion joint? the metal expansion joints will make movements freely under allowable movements value, once exceed the movements, the limited rods will make affects and limit the movements and protect the metallic expansion joint, in this way to ensure safety operation of the pipeline.

What’s the working principle of dismantling joint coupling? Dismantling joint coupling is the protective measure to connect pumps, valves and other equipment with pipes. Dismantling joints can delivery the axial thrust to whole pipeline.

In brief, metal expansion joint compensate pipeline movements and dismantling joint compensate pipeline installation error and deliver axial thrust. If you have other doubts on the working principle of expansion joints and dismantling joints, please email to ins1@lanphan.com.

Looking for High Quality Suppliers of Stainless Steel Bellows?

Are you looking for high quality suppliers of stainless steel bellows? Let Henan Lanphan help you to find one. As a China stainless steel bellows supplier with 30-year experience, we value two things when choosing suppliers of stainless steel bellows. One is product quality, the other is service.

Good quality can tell things. Stainless steel bellows are used to compensate movements and absorb pipe thermal deformation, its major applications covers industries of petroleum, chemical engineering, nuclear energy, power plant, water treatment... Lanphan is a stand-out supplier of stainless steel bellows in China market, our product has excellent pressure-resistant properties, large compensation amount, good temperature-resistant properties and long working life.

stainless steel bellows

But to be honest, there are not much difference on product quality among so many suppliers of stainless steel bellows, what matters more is service. Henan Lanphan provide complete pre-sale, in-sale and after-sale service during the whole transaction. Lanphan technicians will offer rationalization proposals to assist you to select proper types, 24-hour online service is available in our company, professional quotation information usually is provided to customers within a day.

During the manufacturing process of stainless steel bellows, stainless steel bellows supplier Lanphan will provide product inspection record of key junctures, and production schedule photos to customers. Once you received the stainless steel bellows, you can enjoy one-year warranty period in condition of correct installation, normal maintenance and operation. When warranty period has expired, the stainless steel bellows enjoys lifetime guarantee repair, we only charge cost price for changing standard component and sealing component. Also lifelong free technical support is provided in Henan Lanphan.

Henan Lanphan is a China stainless steel bellows supplier, we sell bellows compensator, rubber expansion joints, metal expansion joints, pipe fittings, metal hoses and so on. If you are looking for stainless steel bellows suppliers, give us a chance to serve for you. Email us at best@lanphan.com.