PP pipe specification parameters and installation matters

PP pipe, PPR pipe, PP rod, polypropylene pipe rod, PP profile, HIPS pipe, HIPS profile (high impact polystyrene pipe)

First, PP pipe product features:

Small specific gravity, non-toxic, insulating, acid resistant, alkali, corrosion resistant. Product use: Suitable for the processing of products and parts in the food, pharmaceutical and chemical industries. Physical properties: tensile test MPA is greater than or equal to 36 Density: g / cm 3 0.85, elongation at break is greater than or equal to 4.0 Product Appearance: The surface is smooth and flat, allowing for unevenness and uneven color. Product color: generally water gray, or according to user requirements. Size: Bar length is 1 m ± 0.02.

PP pipe, PPR pipe - the color is light-transparent milk white, long-term use temperature up to 120 o C, cold resistance, smooth surface, rigidity, wear resistance, stress crack resistance, resistance to most chemicals, non-toxic, good elongation. The hot working shrinkage rate is large. The price is low. Usually red, white, black, blue, etc. Can be used for lighting, electronics, toys, hardware, etc.

HIPS tube - the color is light-transparent white, with high toughness, its impact strength is more than seven times that of ordinary polystyrene tube, excellent surface gloss and dyeing performance, and balanced mechanical properties. However, tensile strength, hardness, transparency, softening point, and stability to light and heat are reduced. Resistant to methanol, acetone, glycerin, alkali, dilute acid, inorganic salt, vegetable oil, not resistant to esters, aromatic hydrocarbons, chlorinated hydrocarbons, ethers, ketones, higher alcohols, concentrated acids, strong oxidizing acids and turpentine, etc., with excellent electrical properties. All kinds of general-purpose PP pipe, white PP pipe, color PP pipe, PP pipe for toy hardware, cheap PP pipe, and various profiles are widely used in daily life or production. Welcome to sample and sample processing, mold opening by yourself. discount price.

Glass fiber reinforced polypropylene FRPP pipe advantages:

Long service life: FRPP pipes can be safely used for more than 50 years under rated temperature and pressure conditions.

·Excellent corrosion resistance: It can withstand the corrosion of most chemicals and can withstand a wide range of high-concentration acids and alkalis with a pH range of 1-14.

Excellent anti-wear performance: When transporting ore mud, the wear resistance of FRPP pipe is more than 4 times that of steel pipe.

·High rigidity: FRPP pipe is not easily deformed due to the addition of glass fiber reinforced materials.

· Heat-resistant insulation and energy saving: FRPP pipe has a maximum operating temperature of about 95 °C. The thermal conductivity of this product is only 1/200 of that of steel pipe, so it has better insulation performance.

Reliable connection performance: The strength of the FRPP tube hot melt interface is higher than that of the pipe body, and the joint will not be broken due to soil movement or load.

·Good construction performance: the pipeline is light in weight, the welding process is simple, the construction is convenient, and the comprehensive construction cost is low.

Second, PP pipe properties:

PP pipe performance

Third, PP pipe specifications:

PP pipe specifications

Fourth, the classification of PP pipe:

1. PP-B (block copolymerized polypropylene) is also commonly known as hot-melt tube because it uses welding skill in construction. Because it is non-toxic, light, pressure-resistant and corrosion-resistant, it is becoming a kind of implementation data, but the current decoration project is still less used. Generally speaking, this material is not only suitable for cold water pipelines, but also suitable for use. In hot water pipes, even pure drinking water pipes.

2. PP-C (modified copolymerized polypropylene) tube, the function is basically the same as above.

3, PP-R (random copolymer polypropylene) tube, the function is basically the same as above.

The physical characteristics of PP-C(B) and PP-R are fundamentally similar, and the limitations of use are the same, and they can be exchanged and used in engineering. The primary difference is that PP-C(B) data is better than PP-R for low temperature brittleness; PP-R data is better than PP-C (B) for high temperature resistance. In practice, when the liquid medium temperature is ≤ 5 ° C, PP-C (B) tube is preferred; when the liquid medium temperature is ≥ 65 ° C, PP-R tube is preferred; when the liquid medium temperature is 5 ° C - 65 ° C In the inter-region, the functions of PP-C(B) and PP-R are basically the same.

5. Chemical and physical characteristics of PP pipes:

Because of the high degree of crystallinity, this material has good surface stiffness and scratch resistance. There is no stress cracking problem in PP. The low MFR PP tube has better impact resistance characteristics but lower elongation. Regarding the same MFR data, the copolymer type has higher strength than the homopolymer type. Because of crystallization, the shortening rate of PP is quite high, generally 1.8 to 2.5%. The strength of the PP tube increases with the addition of ethylene content. The Vicat softening temperature of PP is 150 °C. In the GM, PP is modified by means of glass fiber, metal additive or thermoplastic rubber.

The PP tube is a semi-crystalline material. It is stronger and has a higher melting point than PE. Because the PP temperature of the homopolymer type is very brittle when it is above 0 °C, many traded PP materials are non-linear copolymers of 1 to 4% ethylene or clamp copolymers of higher ethylene content. The copolymer type PP data has a lower heat distortion temperature (100 ° C), low brightness, low gloss, low rigidity, but has a stronger impact strength. The activity rate of PP is limited to 1~40. Moreover, the bias average of the shortening rate is much better than that of PE-HD. Participation in 30% of the glass additive can reduce the shortening rate to 0.7%. Both the homopolymer type and the copolymer type PP materials have excellent moisture absorption resistance, acid and alkali corrosion resistance, and ablation resistance. However, it does not have any resistance to aromatic hydrocarbon (such as benzene) solvent, chlorinated hydrocarbon (carbon tetrachloride) solvent, and the like. The PP tube does not have oxidation resistance at high temperatures like PE.

Sixth, choose PP pipe:

After purchasing a good PPR tube, we can't ignore the quality of the installation. The simple way to judge is whether the overflow around the melt interface is uniform, the overflow side is annular, and the tube and tube are well bonded. The marking lines on all pipes are still in line after installation, and some of the pipes have protruding lines on the outside and should be aligned with them. After the installation is completed, first pass the water check. After confirming that there is no water leakage, pressurize it to 4Mpa with the test press for 24 hours. There is no obvious pressure drop and water leakage, indicating that the installation is qualified and the air tightness is good. In addition, it is recommended that you use a buried tube in the installation.

A. Touch: Whether the texture is fine and the particles are uniform. Nowadays, PP pipes mainly have white, gray and green colors. Under normal circumstances, recycled plastics can't be white, so many people think that white is the best. In fact, this view is one-sided. As technology updates increase, color is not the standard for distinguishing PPR tubes. If the tube is good or bad, it can't solve the problem. Touching it, the coarse particles are likely to be mixed with other impurities.

B, smell: there is no smell. The main material of the PPR pipe is polypropylene. The good pipe has no odor, and the poor one has a strange smell. It is likely to be blended with polyethylene instead of polypropylene.

C, pinch: PPR tube has a considerable hardness, can be squeezed into a deformed tube, certainly not a PPR tube.

D, ç ¸: Good PPR tube, "rebound" is good, too easy to smash naturally is not a good PPR tube. However, the hardness is not equal to the elasticity. If you have a PPR tube that cannot be broken, you should leave doubts. Because some unscrupulous manufacturers increase the hardness of the pipe by adding too much impurities such as calcium carbonate, such a pipe is prone to brittle cracking for a long time.

E, burning: Ignition and burning, very intuitive and very useful. The PPR pipe mixed with recycled plastic and other impurities in the PP pipe material will emit black smoke and have a pungent smell; after burning, the pipe material will not emit black smoke or odor, and the melted liquid will still be clean after burning. .

Seven, PP pipe installation notes:

1. In order to ensure the installation quality of PP-R polypropylene pipe, the inner and outer walls of the pipe should be smooth, flat, free of bubbles, cracks, cracks, dents, peeling and severe cold spots and obvious marks.

2. The pipe of PP pipe is cut by small copper pipe cutter. The blade is perpendicular to the outer wall of the pipe. When the knife is tight, it should not be too tight. After the cutting line is first wound around one turn, the depth of the knife is rotated every turn, and the pipe is cut quickly. Slowly turn to prevent the broken pipe from falling. At the cutting point, apply a reaming cone cutter to the neck portion of the nozzle, or use a round file to eliminate the chamfer inside the tube. It can also be cut with a special pipe: the pipe clamp should be adjusted to match the diameter of the pipe, and the force should be evenly applied when the screw is cut. After cutting, the complete round of the complete rounder should be applied at the fracture.

3, PP-R polypropylene pipe installation side connection can be welded, hot melt and threaded connection, etc., and the hot melt connection is the most reliable. The PP pipe is easy to operate, has good air tightness and high interface strength. Before connecting, firstly Machine the pipe end to a groove of about 30 degrees, and wipe the connected pipe and pipe end with cotton yarn to make it dust-free, oil-free, and insert the mark.

4. When the PP-R polypropylene pipe is connected with the metal pipe fitting, the PP-R pipe with metal thread insert is used as the transition. The pipe fitting is connected with the polypropylene pipe by hot-melt socket, and the hardware of the metal pipe fitting or sanitary ware. When the fittings are connected, the spiral connection is used, and the polyvinyl fluoride raw material tape is used as the sealing filler, and the thick white paint and the hemp yarn are not suitable.

5. The pipe support should be buried before the pipeline is installed. The maximum installation distance of the cold and hot water pipe supports meets the requirements of the specification.

6. The horizontal pipe of the PP pipe is bent longitudinally and horizontally, the verticality of the riser pipe, and the installation deviation of the pipes and valves in the row must meet the requirements.

Stainless Steel Wire Mesh

Plain Weave Each weft Wire passes over one and under one warp wire, and each warp wire passes over one and under one weft wire, every weft wire have and warp wire the same diameter.
Characteristics: square aperture ,high flow through , relative high open area, as result less pressure drop during filtration suitable for all kinds of filtration up to 63 µm.

Twill Weave Each weft wire passes alternately over two, and then under two successive warp wires and each warp wire passes alternately over two and under two successive weft wires. It is possible to be used to allow a heavier than standard wire diameter.We can supply the mesh from 30 mesh to 500 mesh.
Characteristics: square aperture, less rigid than plain weave, especially suitable for deforming, strong wire cloth due to ratio of wire diameter and aperture, it is mostly used for filtration less than 63 μm .

Usage: used in petroleum,chemical industry,mine,environment protection,food industry,paper-making,electronic industry,etc

Application:

In acid, alkali environment conditions sieving and filtering.

Petroleum industry as mud mesh,.

Chemical fiber industry as screen mesh.

Plating industry as acid cleaning mesh.


Stainless Steel Wire Mesh

Stainless Steel Wire Mesh, Stainless Steel Woven Wire Mesh, Steel Wire Mesh

Anping County ShunXing Hardware Wire Mesh Co., Ltd. , http://www.shunxing-fence.com