High-precision cold drawn carbon steel pipe is a new type of high-tech energy-saving products. In recent years, the use of this technology to produce precision steel pipe has been widely used in domestic hydraulic, pneumatic cylinder, coal downhole stent (pillar), oil pump pipe, jack and other manufacturing areas. High-precision cold drawn steel pipe to promote the use of steel, improve processing efficiency, energy conservation, reduce the hydraulic cylinder, cylinder processing equipment investment is important.Cold drawn way: the production of high-precision cold-drawn tube � � hydraulic cylinder compared with the traditional cutting process, has the following characteristics:(1) High production efficiency: the traditional method of production of an inner diameter of 420 mm, 12 meters long cylinder to be 154 hours, with cold drawing method of production only 4 minutes.(2) High rate of genuine: the boring of the rolling head and play a guiding role in the cutting process, the blank tube due to self-weight deflection, resulting in rolling head and boring tool deviation, resulting in waste. Genuine rate can only reach about 60%, while the use of cold-drawn method of production, genuine rate of up to 95% or more.(3) High metal utilization: the traditional boring method of manufacturing cylinder, metal utilization rate of only 50-70%. With the drawing method of production, the metal is not only cut into iron, but can get 30% extension, metal utilization up to 95%.(4) Improve the mechanical properties of finished mild steel pipe: the use of drawing method, so that the blank get more than 30% of the plastic deformation, due to hardening and processing of finished pipe metal strength limit greatly improved. Generally in the finished product tube strength limit increased by 60%. High-precision cold-drawn tube is a seamless hot-rolled steel pipe,DSAW steel pipe for the blank, after chemical treatment in a special cold drawn machine, through the special deformation of the design of the mold to draw to produce high-precision tube. Its dimensional accuracy of H10 ~ H8, straightness of 0.35 ~ 0.5mm / m, surface roughness of Ra1.6-0.4.
Langtang Trek – A More Isolate Way of Adventure Trekking
Langtang National Park was the 3rd most renowned trekking province in Nepal after the Everest and Annapurna provinces. This changed significantly following the destructive earthquake that struck Nepal in 2015, 28th of April. Just a few days following the shattering earthquake the already smashed village of Langtang was struck by a massive landslide and got totally swept away. And just like that, the largest village of the area ceased to subsist.
There is been so many lies and rumors online on the globe’s traveling forums & guidebooks, that since the destructive earthquake occurred the gorge is closed for hiking. Let me tell you that that is absolutely rubbish and the Langtang trek is open for hiking.
The natives that still exist in the gorge were nearly begging us to tell other travelers we met that Langtang Valley is 100 percent open for business. The locals state that the only way they can persist their life is if travelers come back to the valley. And we did meet few other trekkers on the route apart from a few porters carrying building materials up the gorge.
Langtang Trekking:
Trust me the scenery here in the Langtang Valley is absolutely awe-inspiring and you can experience the trek in a more adventurous way as the region is visited by a lesser number of travelers. To the west side of Langtang is Ganesh Himal with a range of 6000-7000 meters. The Helambu and Gosainkund province lies to its south; these can be merged with Langtang to extend your trek from 7 to 21 days. The province was elected Nepal’s 1st Himalayan National Park in the year of 1971. It’s inhabited by Sherpa and Tamang people whose spiritual practices, dress and languages are pretty identical to Tibetans. The woodlands in the province have temperate & sub-alpine flora. Wildlife encompasses deer, migratory birds, pika, monkey and tahr. Spring to autumn is the most ideal time to trek in the Langtang region. A majority of the trekking trails in Langtang and Helambu are well-catered with teahouses making independent hiking rather feasible. A trip to the Langtang valley also offers you a chance to discover the Tamang villages, ascend small summits and to explore glaciers at a more comfortable height than other trekking provinces.
You can also combine mansalu trek and ghorepani poonhill trekking with your Langtang trek if you have sufficient time and looking for more adventure. Trust me, the adventure will last lifetime!
—
The Fire Prevention Function of Fertilizer Special Pipe
For the practical application of fertilizer tube to overcome the lack of fire prevention, fire protection must be handled, its purpose is to improve the fire resistance of structural steel pipe to the design specification limits. Here are several different steel structure fire protection measures.
First, the outsourcing level. Structure is the appearance of the fertilizer tube to add outsourcing layer, cast molding, spraying method can also be used. In-situ forming solid layer of concrete is usually outsourced to strengthen steel mesh or steel, to limit the shrinkage cracks, and to ensure that the shell strength.
Second, the water-filled (water jacket). Water-filled hollow carbon steel pipe structure is the most effective protection against fire measures. This approach can make steel in the fire to keep a lower temperature, the water circulating in the fertilizer tube, heating the heat absorbing material itself.
Third, the shield. Fertilizer tube set in the refractory composition of the wall or ceiling, or within the components concealed in the gap between two walls, as long as a slight increase in refractory or not to increase the fire that is able to achieve the purpose.
Fourth, the expansion material. The use of fire-resistant coating to protect steel components, this method has good fire insulation properties, construction from steel geometry restrictions, etc., generally do not need to add fertilizer tube support facilities, and the coating quality of light, there is a certain The beautiful decorative effect, belongs to modern technology and advanced fire protection measures for mild steel pipe.