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Crude oil has fallen sharply, even plastics may be limited
Dalian Plastics (LLDPE) futures continued their gains on the 11th. The main 1105 contract closed at 12,355 yuan/ton, up 135 yuan/ton. Technically, even the plastic upside form is still well preserved. Fundamentally, the continued rise of Asian ethylene prices will provide certain support to Liansu. And now it is about to enter the peak season of agricultural film demand, manufacturers have stocking needs and support LLDP to a certain extent, and the market outlook is expected to continue to fluctuate and rise. Crude oil fell sharply last Friday, and it is expected that even plastics growth may be limited.
The New York Mercantile Exchange (NYMEX) crude oil futures closed at a two-month low on the 11th, as the news of Egyptian President Mubarak’s resignation eased concerns about continued tensions in Egypt that may lead to the disruption of major crude oil pipelines. The settlement price of March crude oil futures contract fell 1.15 US dollars to 85.58 US dollars per barrel, the lowest settlement level since November 2010, a drop of 1.3%. The situation in Egypt has changed rapidly in recent days. On the evening of the 10th, Mubarak stated that he would not resign before the September election, but at the same time handed over some power to the Vice President of Egypt. This decision made the demonstrators in downtown Cairo very angry, and they demanded that Mubarak step down immediately. Many traders said that the rapid changes in the situation caused the crude oil market to fall into violent volatility, but they did not give the direction of crude oil prices.
In the Asian ethylene market, the Southeast Asian market closed up US$10 to US$1220.5-1222.5/ton CFR, and the CFR Northeast Asian market was calm and closed at US$1309.5-1310.5/ton. In Northeast Asia, the South Korean market was stimulated by the planned overhaul of equipment, and demand was strong. Some downstream plants in China were shut down. Zhenhai Petrochemical’s 550,000-ton ethylene glycol plant was shut down for maintenance for 7 days due to mechanical failure, and there was sufficient ethylene spot supply. In Southeast Asia, supply in Singapore and the Middle East is tight.
In terms of spot, the ex-factory prices of spot companies have adjusted prices to varying degrees, with an increase of between 100-300 yuan. In terms of spot quotations, the international crude oil continued to adjust. Driven by domestic price increases, prices have largely stabilized and moved slightly in some areas. Reported high, but the downstream wait-and-see atmosphere is strong, and the transaction is average. Among them, merchants in the South China PE market are mainly waiting and watching, and downstream factories are preparing to start construction one after another. Demand is quite scarce. The linear mainstream price is 11,200-11,400 yuan/ton. The PE market in East China reported a steady high. As demand has not yet recovered, merchants will wait and see for the time being. The linear mainstream price is between 11100-11200 yuan/ton. The quotations in the North China PE market rose, and the trading atmosphere was still light. In the morning, the merchants had a strong wait-and-see attitude, and the linear mainstream quotation was 11100-11200 yuan/ton.
As downstream factories continue to start construction, procurement and stocking will be concentrated in the last two weeks. The short-term increase in demand will make it possible for petrochemicals to continue to raise prices. From a cost point of view, the optimistic price of raw materials still has a large room for plastic stocks to rise. It is generally expected that Liansu will maintain an upward trend in the next period of time, but the expectation of monetary policy tightening still exists. In addition, there are not many petrochemical equipment maintenance plans in the near future, the market supply is sufficient, and the upward range of LLDPE futures is expected to be limited.
Source: CICC Online
Article source: China Building Materials Network www.bmlink.com
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Characteristics and connection method of PE gas pipe
1. Features of PE gas pipe
1. Good hygiene performance: no heavy metal salt stabilizer is added during PE pipe processing, the material is non-toxic, no scaling layer, no bacteria breeding, and it solves the secondary pollution of urban drinking water.
2. Corrosion resistance: Except for a few strong oxidants, it can withstand the erosion of a variety of chemical media; no electrochemical corrosion.
3. Long service life: PE pipes can be used safely for more than 50 years under rated temperature and pressure conditions.
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PE gas pipe adopts gas polyethylene pipe with many excellent properties and is used in the field of gas transportation. The corrosion of steel pipes and cast iron pipes and the leakage of joints will be completely solved, thus ensuring the safe operation of the gas pipeline network system. The PE material selected for the PE gas pipe is an inert material, which can withstand the erosion of a variety of chemical media.
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Ways to reduce the noise of PVC drainage pipes
While adding stabilizers to improve the chemical stability and strength of pvc pipes, the sound insulation performance of the plastic itself has been greatly weakened. Therefore, in the current situation of reliable mechanical performance of pvc drainage pipes, how to solve the problem of sound insulation and noise reduction has become a top priority. The author believes that we can start with the noise source and adopt the following improvement measures to improve its sound insulation performance:
①It is made into double-wall hollow sound-proof PVC drainage pipe
The special equipment for PVC pipe extrusion is modified, an intermediate mold is added between the inner and outer jacket, and the outer mold is modified to increase the intermediate distance to form a hollow cavity between the two walls, so that the plasticity of PVC will not be changed. But it can increase the damping of the pipe along the flow direction, thereby increasing
Strong sound insulation effect.
Using single-wall double-material PVC pipe
On the basis of the original single-wall PVC pipe, a secondary formula is carried out, that is, the porous sound-absorbing material formed by plastic foaming technology is used to increase the wall thickness to achieve the purpose of increasing the damping along the outer wall direction, so as to obtain a good sound insulation effect. A set of equipment needs to be added, thus increasing the manufacturing cost.
Muffled PVC drainage pipe
The PVC pipe is made into a muffled drainage pipe with spiral fins attached to the inner wall. At this time, its outer wall is still a PVC hard plastic pipe (to ensure the required strength of the drainage pipe), but a certain width of flexible and strong soft is attached to the inner wall Plastic spiral belt, which unloads part of the impact pressure of the water flow onto the spiral belt, thereby buffering the pipe wall.
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What is the difference between PVC water supply pipe and PVC drainage pipe
1. Different purposes: one for water supply and one for drainage. PVC water supply pipes are mainly used for: a. Indoor water supply and reclaimed water systems for civil and industrial buildings; b. Buried water supply systems for residential quarters and factories; c. Urban water supply pipeline systems; d. Water treatment plant water treatment pipeline systems; e. Marine aquaculture; f. Garden irrigation, well sinking and other industrial pipes. PVC drainage pipes are mainly used for building drainage and domestic sewage drainage.
2. Different specifications: PVC water supply pipes have more specifications and models, and PVC drainage pipes have relatively fewer specifications and models, because the drainage system itself does not require too many specifications. Even with the same model (outer diameter), the wall thickness of the water supply pipe and the drain pipe are often different, because the water supply pipe requires pressure, and the drain pipe usually does not need to consider the pressure.
3. The price is different: This will not be explained in detail, and the specific price can be consulted by each manufacturer.
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