Pvc pipe and fitting size chart description

 Pvc pipe and fitting size chart description

Pvc pipe and fitting size chart includes the national standards, sizes, Imperial and Metric, symbols, etc

 The meaning of De, DN, D, Φ

The diameter of PVC pipe and fitting can be divided into outer diameter (De), inner diameter (D), and nominal diameter (DN).

1. DN refers to the nominal diameter of the pipe, which is the average of the outer diameter and the inner diameter. The value of DN=the value of De-0.5*tube wall thickness. Note: This is neither the outer diameter nor the inner diameter. Water and gas transportation steel pipes (galvanized steel pipes or non-galvanized steel pipes), cast iron pipes, steel-plastic composite pipes, and polyvinyl chloride (PVC) pipes shall be marked with a nominal diameter “DN” (such as DN15, DN50).

2, De mainly refers to the outer diameter of the pipe. The outer diameter of PPR, PE pipe, and polypropylene pipe is generally marked with De, and all need to be marked in the form of outer diameter * wall thickness, for example, De25×3.

3, D generally refers to the inner diameter of the pipe.

4, Φ represents the diameter of an ordinary circle; it can also represent the outer diameter of the pipe, but in this case, it should be multiplied by the wall thickness. For example, Φ25×3, which means a pipe with an outer diameter of 25mm and a wall thickness of 3mm. For seamless steel pipes or non-ferrous metal pipes, “outer diameter × wall thickness” should be marked. For example, ф108×4, ф can be omitted. Some steel pipe standards in China, ISO, and Japan use wall thickness dimensions to represent the steel pipe wall thickness series. The expression method for this kind of steel pipe specifications is pipe outer diameter×wall thickness. For example, ф60.5×3.8.

The range of De, DN, and ф

1. De — outer diameter of PPR, PE, and PP pipes;

2. DN — nominal diameter of PVC pipe, cast iron pipe, steel plastic composite pipe, and galvanized steel pipe;

3. ф — seamless steel pipe or non-ferrous metal pipe shall be marked with “outer diameter × wall thickness”, such as ф 108×4.

Pvc pipe and fitting size (Imperial and Metric Pipe Sizes comparison chart below)

Inch or mm: where did the confusion come from?

Tubes whose diameter is defined by inches (1-, 2-) and/or fractions of inches (1-, 1′-1), a generally accepted standard for water and gas supply.

The PVC pipes and fitting used for gas or water networks are usually measured in inches and not in millimeters. The diameter of the tube inch is 33,5 mm (see table), but the size of the inch in the SI system is 24,4 mm. The problem is that the size of the tubes is determined by the internal diameter and not by the outer diameter.

Measure the 1-diameter (how to measure the tubes is described below) and you will have a value equal to 33,5 mm, which obviously contradicts the classic linear conversion graph.

Normally, installing tubes in inches does not cause problems. But during its substitution by plastic, copper, or stainless steel, a problem arises- the one-inch indicated value does not match its actual value. Normally, this incompatibility is disconcerting, but if you look more deeply at the processes that occur in the tube, everything will fall into place.

The main point is that during the creation of the water flow, the main role is given to the internal diameter, not to the outer diameter, and so they use it as a designation. But the discrepancy with the usual rating system still remains, as for a regular tube the internal diameter is 27,1 mm, and for a reinforced tube- 25,5 mm. The latter is not far from equal that an inch is equal to 25.4, but not yet.

The fact is that the tubes are indicated by a nominal diameter, which is rounded to a standard value (conditional passage Dy).

Suppose the external diameter of the tube is 159 mm with a 7-mm wall thickness; in this case, the next exact diameter, which can be calculated by the formula D u003d 159 -7* 2u003d 145 mm, will be the exact internal diameter. With a 5-millimeter wall thickness, the diameter will be 149 mm. But in the first and second cases, the conditional pass will be the same and it will be 150-millimeter.

Both Imperial and Metric pressure pipe and fitting product quality are exactly the same.

Imperial is also known as the inch, and the inch is the unit of length. 1 inch = 2.53999918 cm (CM). The inch is used in the United Kingdom, the United States and other countries also use it.

Metric is also know as the MM,This size is widely used in Europe, Asia, China, and other countries.

For example, the DN25 (25mm, the same below) PVC water pipe and fitting is the British 1″ water pipe, which is also the previous 8-point water pipe.
The DN15 PVC water pipe and fitting is the British 1/2″ water pipe, which is also the previous 4-division water pipe.
For example, the DN20 PVC water pipe and fitting is the British 3/4″ water pipe, which is also the previous 6-point water pipe.

The relationship between outer diameter and DN, NB is as follows:

International pipe size comparison table

We’ve clearly defined this by listing both the Metric and Imperial sizes in our plastic pipe fittings catalog and on our website.

What Plastic do we offer?

we supply pvc pipe and fitting,cpvc pipe and fitting,ppr pipe and fitting,ips pipe and fitting,pvc rain gutter and so on.

What PVC do we offer?

Our PVC pipes and fittings are of excellent quality.

• Pipes
• Fittings
• Ball Valves 
• Flanges
• Accessories

• GARDEN HOSE FITTING

• ELECTRICAL

How to repair a PVC ball valve

 

How to repair a PVC ball valve

 

A PVC ball valve is a type of valve that has a spherical disc that controls the flow of water or air through it. A ball valve is a crucial component of the plumbing system as it provides shutoff during seepage times. However, this does not mean that the PVC ball valve is already immune to wear. In fact, there are times when the ball valve becomes loose before the leak gets worse. When it comes to PVC ball valve repair, you just need to know the basics of plumbing and for this particular task, and the skill you will gain from this project will help you rectify other problems you will encounter in your plumbing system. For this DIY project, you will need the following things to get the job done quickly.

Screw
Screwdriver
Allen wrench
Replacement parts
Lubricating oil or petroleum jelly
Dry cloth or sponge

Step 1 – Turn off the water supply

To carry out this task properly, you must disconnect the water supply so that the flow of water does not interrupt your work while you repair your ball valve. Once the valve is closed, empty the excess water into the jug or container and wipe the valve dry with a dry cloth or sponge. Remove the handle that holds the PVC ball valve. You will find that the ball valve is held firmly together with a set of screws, so use an Allen wrench or screwdriver to remove the ball valve.

Step 2 – Remove the ball valve

To evaluate your problem ball valve, disassemble the entire valve and examine each part and check for worn or destroyed parts. You can purchase the replacement kit you need to repair your PVC ball valve from the hardware store. It will also help if you bring the worn part to the hardware with you while you look for the replacement part. Be sure to keep all the bolts and other parts of the ball valve in a safe place so that you can easily put it back in order later.

Disassemble

Keep the PVC ball valve in the half-open position to flush out the dangerous substances that may exist inside and outside the ball valve.
Close the PVC ball valve, remove the bolts and nuts on the flanges on both sides, and completely remove the valve from the pipeline.
Disassemble the drive device-actuator, connecting bracket, lock washer, stem nut, butterfly shrapnel, glam, wear-resistant piece, stem packing in order.
Remove the body cover connecting bolts and nuts, separate the valve cover from the valve body, and remove the valve cover gasket.
Confirm that the valve ball is in the “off” position, which can be easily taken out of the valve body, and then remove the valve seat.
Gently push the valve stem down from the hole in the valve body until it is completely taken out, and then take out the O-ring and packing ring.
Note: Please operate carefully to avoid scratching the surface of the valve stem and the packing seal of the valve.

Step 3 – Replace the worn parts of the ball valve

Once you have located the worn part of the ball valve, make sure you have the exact replacement and replace the damaged part. Before reassembling everything, apply petroleum jelly or lubricating oil to the valve to make it easy to replace the parts without any problems. Putting the pieces together and putting everything in order is very easy. All you have to do is reverse what you did while disassembling the valve. Secure the parts with the screw before testing the ball valve for any leaks by turning on the mainline of your plumbing system. Then check if the PVC ball valve is still leaking.

Step 4 Reassemble

Clean and inspect the parts under investigation. It is strongly recommended to replace the seat and bonnet gaskets and seals with spare parts kits.
Reverse the order of disassembly and assembly.
Use the specified torque to tighten the flange bolts crosswise.
Tighten the nut with the specified torque.
After installing the actuator, rotate the valve stem to drive the spool to rotate the corresponding input signal to make the valve open and close.
If possible, after installing the pipeline, test the sealing pressure and performance of the valve according to the standard

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How to produce PVC pipe

1、 Process flow

PVC resin is used for the forming of PVC pipe, and stabilizer, lubricant, filler, etc. are added. These raw materials are kneaded according to the formula after proper treatment. If single screw extruder is used for extruding pipe, the kneaded powder shall be made into particles and then extruded for forming; if twin screw extruder is used, powder can be directly used for forming.

In addition, powder can be used to extrude pipe directly without granulation in production, but two points should be noted:

(1) The twin-screw extruder is the best way to extrude the powder directly. Because there is less mixing shearing and plasticizing process between the powder and the granule, the twin-screw extruder can strengthen the shearing and plasticizing and achieve the expected effect;

(2) Because the granular material is more dense than the powder material, and the heating and heat conduction are poor, the processing temperature of the powder material can be about 10 ℃ lower than that of the corresponding granular material.

2、 Process conditions and control

In the production process, because PVC is a heat sensitive material, even adding heat stabilizer can only increase the decomposition temperature, and extend the stability time without decomposition, which requires that the molding and processing temperature of PVC should be strictly controlled.

1. Temperature control

Temperature control is an important control factor in extrusion operation. The temperature of the control factors needed for extrusion is barrel temperature, diameter temperature and die temperature. The temperature is too low, the plasticization is not good, the appearance of the pipe is not glossy, the mechanical properties are poor, the product quality can not meet the requirements: the temperature is too high, the material will decompose, the product discoloration and other phenomena appear.

2. Screw speed

With the increase of screw rotation speed, the extrusion volume will increase, so the output can be increased, but it is easy to produce the phenomenon of poor plasticization, resulting in the roughness of the inner wall of the pipe and the decrease of the strength. At this time, the head pressure should be adjusted to achieve the best output and quality. The temperature control of screw affects the conveying rate, plasticization and melting quality of materials. The extrusion pipe needs cooling water to reduce the screw temperature, which is conducive to improving the plasticizing quality. The screw cooling water temperature is about 50 ~ 70.

3. Traction speed

In the re extrusion operation, it is very important to adjust the traction speed. After extrusion, melting and plasticizing, the material is drawn after continuous extrusion from the head, thus entering the setting device, cooling device, traction device, etc. the traction speed should match the extrusion speed. Generally, in normal production, the pulling speed should be about 1% ~ 10% faster than the extrusion speed of pipe.

4. Compressed air and pressure

Compressed air can blow the pipe and keep the pipe roundness. It is required that the pressure should be appropriate. The pressure is too small, the pipe is not round, the pressure is too large, the core mold is cooled, the inner wall of the pipe cracks, is not smooth, and the quality of the pipe decreases. At the same time, the pressure is required to be stable. For example, the pressure varies from big to small, and the pipe is prone to produce the status quo of slub.

5. Temperature of sizing device and cooling device

Different sizing methods and cooling methods are used to extrude different plastic products. The cooling medium can be air, water or other liquids, and the temperature needs to be controlled, which is mainly related to production efficiency, product internal stress, etc.

We are the most professional custom PVC pipes and fittings factory in China. If you need to custom plastic pipes and fittings, please contact us. We will give you the best custom products and satisfactory service.If you want more information, please contact me.

The best pvc fitting manufacturer in china

Xing yin company is the best pvc fitting manufacturer.We produce and wholesale plastic pipe fittings

Pvc fitting include:SCHEDULE 40,SCHEDULE 80,PVC THREAD FITTING BS STANDARD,SCHEDULE 40 PVC DWV FITTING ASTM D2665,GB PVC DWV FITTING,GB PVC FITTING WATER SUPPLY,PVC Pressure Pipes And Fittings PN10 (DIN),PVC GASKETED FITTING,PVC TIS FITTING,PVC PRESSURE FITTING NBR5648,PVC GUTTER,PVC ELECTRICAL FITTING, PVC ELECTRICAL CONDUIT,3 WAY PVC FITTING etc.

Cpvc fitting include:CPVC FITTING SCH40 (ASTM D2846),CPVC FITTING SCHDULE80,CPVC FIRE SPRINKLER FITTING

pvc fitting and cpvc fitting list: pvc fitting elbow,pvc fitting tee,pvc fitting union,pvc fitting coupling,pvc fitting Reducing tee,pvc fitting adaptor,pvc fitting end cap,pvc fitting copper elbow

As a pvc fitting manufacturer,Products are made of high quality raw materials.

As a pvc fitting manufacturer,Our pvc fittings have the following advantages：

1.Strong and durable: thickened material, avoid smooth, firm and wear-resistant, strong and durable, long service life

2.Fine workmanship: fine workmanship, polishing treatment, beautiful and wear-resistant, convenient installation, high quality.

3.Good corrosion resistance: the product has good corrosion resistance

4.Good corrosion resistance: the product has good corrosion resistance

5.PVC pipe fittings are light in weight, convenient for handling, and labor cost can be saved

6.Excellent chemical resistance: PVC pipes and pipe fittings have friendly acid, alkali and corrosion resistance, which is very suitable for the chemical industry.

7.Low fluid resistance: PVC pipes and pipe fittings have smooth walls and low fluid resistance. Their roughness coefficient is only 0.009, which is lower than other pipes. Under the same flow rate, the pipe diameter can be reduced.

8.High mechanical strength: PVC pipes and pipe fittings have good water pressure resistance, external pressure resistance, impact resistance, etc., which are suitable for various conditions of engineering

9.Excellent electrical insulation: PVC has superior electrical insulation, which is suitable for conduit of wires and cables, as well as wire piping on buildings.

10.No impact on water quality: PVC pipes and pipe fittings are proved by the dissolution experiment not to affect the water quality, so they are very suitable for the pipes of tap water.

11.Simple construction: PVC pipe combined construction is quick and easy with low factory cost

As a pvc fitting manufacturer,we must have best workshop.

As the best pvc fitting manufacturer in China,We can customize product colors for customers, if you have drawings, we can customize products for you.Shijiazhuang xing yin import and export trading Co.,Ltd Provide customers with the best products and best service.

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The best ppr pipe and fitting manufacturer in china

Xing yin company is the best ppr pipe and fitting manufacturer in china.

The company now has PVC pipe and pipe fitting production workshop, PPR pipe and pipe fitting production workshop.

PPR pipe fittings of the company include:ppr fitting tee,ppr fitting elbow,ppr fitting coupling,ppr fitting clip,ppr fitting cross,Ppr fitting double female threaded brass elbow and so on.

The PPR pipe fittings produced by our company have stable performance, heat insulation, corrosion resistance, smooth inner wall without scaling, safe and reliable pipeline system without infiltration.

Our ppr fittings are made of the best raw materials from China and imported materialsfrom abroad, with long service life and 50 years service life

Our PPR copper threaded pipe fittings are made of the best copper with good quality, oxidation resistance and long service life

 

As the best PPR fitting manufacturer in China, we certainly have the best production workshop. We have two PPR pipe fitting workshops.one is manual cutting workshop,another is Automatic production workshop.

manual cutting workshop

Automatic production workshop

As the best PPR fitting manufacturer in China,We can customize product colors for customers, if you have drawings, we can customize products for you.Shijiazhuang xing yin import and export trading Co.,Ltd Provide customers with the best products and best service.

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how to remove pvc fitting

how to remove pvc fitting

PVC is plastic materials commonly used in plumbing. The pipe is strong and does not wear or leave an aftertaste like other traditional metal pipes. PVC pipes are connected at joints or fittings. These fittings may have many joints on one fitting.

There are two ways to connect PVC pipe fittings, one is to connect with glue, the other is to connect with thread.

The PVC pipe is glued into the joint to create a permanent hold. This “glue” is not a traditional glue as it actually creates a chemical bond with the inserted pipe. Removing a pipe from a fitting can be difficult. The easiest way to accomplish removing PVC from a fitting is having the right tools.

For example:

As a result of worker’s mistake, a down pipe of toilet and 90 degree elbow with cleanout are glued together. Now I don’t know how to separate the two pvc pipe fittings. I don’t know if I can reuse them after separation?

 

Remove the PVC pipes and fittings bonded with glue

1.  direct sawing.

This method will certainly damage one of the pvc fittings. After cutting through the 90 degree elbow with cleanout opening and digging out the bonding pipe in the 90 degree elbow with cleanout opening, the 90 degree elbow with cleanout pipe is no different from the previous one. Of course, it can be reused, but it is hard to say whether the other downpipe can continue to be used.

2. use the physical characteristics of thermal expansion and cold contraction.

Glue will become less sticky when it is hot, so you can use boiling water to heat the joint of two pvc pipe fittings for a few minutes, and then pull out the two pvc pipe fittings connected when they are hot. This method consumes a lot of hot water, but it will not damage the two pvc pipe fittings, and will not affect the later secondary utilization.

3.Use the blower. However, the heating of the blower is usually only partial, so the effect may not be so good as that of hot water. This method is also for reference only.

4.This is a professional method, which is to use PVC glue brush on the inner wall of the pvc fitting, ignite the fire for about 10 seconds, and then use a screwdriver to quickly pry out the inner wall, so that the two pvc pipe fittings can be separated, and the pvc fitting can also be reused.

5.Use tools. First prepare the tools: a hammer, a small slotted screwdriver and a pair of pointed nose pliers. It is easy to damage the pipe fittings by using a slotted screwdriver at the connection of the pipe fittings and beating the screwdriver with a hammer, which can not meet the requirements of secondary utilization at all.

Remove the PVC pipes and fittings bonded with thread

This method is compared with the method of removing PVC pipe fittings connected by this method. Use tools to unscrew the two pipe fittings. Pay attention not to use the strength, do not damage the thread, and avoid affecting the secondary use.

https://www.pvcpipefitting.com/how-to-remove-pvc-fitting/

DIY PVC pipe vertical vegetable

DIY PVC pipe vertical vegetable

You can grow vegetables in your own house with PVC-U pipes. Save space and decorate your house well.

How to grow vegetables with PVC-U tube

1. First, choose PVC-U pipe and saw. The actual length shall be measured according to the distance between the balcony, house or other places.

2. Draw a 5cm horizontal line on each 10cm of PVC pipe, and then saw the PVC pipe

3. After sawing PVC pipe, bake it with fire, take a small pipe and press it down while it is hot (do not press it directly by hand)

4. Install the bottom cover

5. Put in soil, transplant and finish.

Why PVC-U water supply pipe is better

1. The water supply pipe can only be used after strict environmental protection test, but the drain pipe does not have high requirements for environmental protection;

2. PVC-U water supply series pipes do not use lead salt stabilizer, so they are non-toxic,

3. The fluid resistance is small, and the inner wall of the pipe is smooth,

4. Excellent acid, alkali and corrosion resistance

5. It has good pressure resistance, impact resistance and tensile strength

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How to custom PVC pipe and fitting?

How to custom PVC pipe and fitting?

Specialty and Custom pvc pipe and Fitting Solutions

Have you ever been given a complex drawing of a structure or header ,Or you want to make a special pipe fitting and pipe for your product,but you don’t konw Where do I get this?

Shijiazhuang Xingyin Import and Export Trading Co., Ltd. is a professional manufacturer of PVC pipes and fittings. We have professional factories and workshops, and professional technicians in china.

we provide custom pipe fittings to the world’s most demanding industries.we can OEM and ODM all kinds of Plastic pipes and fittings.

HDPE, PVC, CPVC, or any of our numerous polymer materials from which we build customized headers and structures for every application.

Fully customized plastic PVC tubing and pipe can turn a standard job into a tailor-made project that meets your exact design specifications.We provide plastic PVC tubing and pipe that are manufactured to your project’s exact custom lengths, packaging, color, and printing requirements.

Our product line includes elbow, laterals, crosses, true wyes, tees, shaped nipples, spool pieces and stub ends and all kinds of Plastic fittings, both in standard and specialty applications. Large manufacturing capacity combined with our technical expertise allows us to meet customized product needs with uncompromised service and always with the highest quality.

We have already provided services for custom PVC fittings for products of many companies.

For example:outdoor game accessories

We have customized special natural gas pipes for natural gas customers in the United States.

If you have ideas for your products, but there will be no drawings, it does not matter, tell me detailed information, we will Make drawings for you, make molds, make samples, and let you confirm the samples. We will do all the custom pipe and fitting services for you.

Our molds generally use stainless steel and mirror steel, if you have special needs, we can also meet.

We are the most professional custom PVC pipes and fittings factory in China. If you need to custom plastic pipes and fittings, please contact us. We will give you the best custom products and satisfactory service.

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