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First, the production process is different, and the two is lining plastic thickness is not the same. Lined with plastic PE composite pipe is PE pipe in the steel pipe lining, PE pipe wall thickness is generally not less than 4mm. The inner coating of plastic PE composite pipe, is in the steel pipe for PE spraying, the thickness is very thin, generally less than 1mm.s
Galvanized steel pipe is divided into cold galvanized steel pipe, hot galvanized steel pipe, cold galvanized steel pipe has been banned, and the latter is also advocated by the state for the moment, can be used. In 60s and 70s, developed countries began to develop new types of pipes, and galvanized pipes were banned. China's Ministry of construction and other four ministries also issued a civilization, indeed from two, 000 years since the galvanized pipe as a water supply pipe, the New District cold water pipe has rarely used galvanized pipe, and some of the hot water pipe is galvanized pipe.s
Medium work pressure: positive pressure 1.6MPa, negative pressure 96KPaMedium working temperature: -15 DEG C to +70 DEG CThe corrosion resistance: acid and alkali, salt, water, gas corrosion at 60 DEG C below the capability of concentration is below 75% sulfuric acid, nitric acid, below 50% below 90% below 20% phosphoric acid, acetic acid and any concentration of hydrochloric acid, hydrofluoric acid, sulfuric acid, carbonic acid, boric acid, silicate, hypochlorous acid and oleic acid citric acid, various alkali, salt and N3, most of S (gas), Hg (steam), air, NH3, CO, CO2, natural gas, coal gas and other gases. But still have a corrosive effect on concentrated nitric acid, fuming sulfuric acid, acetic anhydride, ketones, ethers and halogenated hydrocarbons, aromatic amine etc..s
Two stage amplifier circuit: the basic structure of the COMS two stage Miller compensation operational transconductance amplifier is shown. It mainly consists of four parts: the first input stage amplifier circuit, the second stage amplifier circuit, the bias circuit and the phase compensation circuit.Amplifier circuit can be a weak AC small signal (superimposed on the DC operating point), by means of a device (as the core of the transistor, field effect transistor), a waveform similarity (distortion), but the output AC signal amplitude has a lot of. The actual amplifying circuit is usually composed of a signal source, an amplifier and a load composed of a transistor.s
Lining plastic process: after the steel pipe is processed, the adhesive is evenly coated on the outer wall of the plastic pipe, and then the steel plastic composite product is expanded in the steel pipe to expand.Rotomold: steel before processing after heating, while rotating the pipe, the polyethylene powder evenly sprinkled on the ground on the inner wall of the steel plastic composite products and then curing treatment and the formation of.s
Polyester fiber refers to the manufacture of fiber material is polyester material; hollow refers to the manufacture of fiber is hollow, like Italy hollow powder, like a tube, there is air in the middle, more conducive to heat insulation. The two are not good, first of all, polyester materials to environmental protection, non-toxic, inexpensive, of course, with such materials can be made in hollow form is better. Maybe that's what you call polyester fibre composite pipess
A medium density polyethylene pipe and PE pipe with high density polyethylene pipe. Divided into SDR11 and SDR17.6 series according to the wall thickness. The former is suitable for transporting gaseous artificial gas, natural gas and liquefied petroleum gas. The latter is mainly used to transport natural gas. Compared with the steel pipe, the construction process is simple, flexible, and more importantly, no corrosion treatment, it will save a great deal of work. Shortcomings as equipment pipe, heating special attention to safety distance in construction, and can not be exposed in the air under the sun, and sensitive to chemicals, to prevent leakage of sewage pipe damage.s