Idler pipe: it is used for electric welding steel pipe of idler of belt conveyor. It is generally made of Q， QA， B steel and steel， with a diameter of -mm. There are certain requirements for pipe tortuosity， end face straightness with the center line and ovality. Generally， water pressure and flattening tests are carried out.
8Most of the original bridge decks lack a stable and solid base course with poor integrity. It is necessary to clear the original bridge deck，Products Show replace it with gravel filler and tamp it)，Daniel FloresAlloy pipe gh 8Mainly in which areas and then pave cement stabilized gravel base course on which reinforced concrete bridge deck is poured. The longitudinal reinforcement and transverse reinforcement of the reinforcement mesh of the bridge deck pavement form a network structure so it has good bonding and anchorage with the concrete， and the load can be evenly dispersed， which obviously improves the performance of the reinforced concrete structure. According to the practice test， the welded reinforcement mesh laid on the road can reduce the occurrence of cracks than the manual binding mesh.
dCubaGenerally， there are many passivation methods for alloy tubes， the common ones are high temperature passivation or sodium cyanide passivation.
Thanks to a zinc tube， stand in the formation and development of painful microorganisms.
VJedidaSpiral welded pipe: it is made by rolling low-carbon structural steel or low-alloy structural steel strip into pipe blank according to the viewpoint of certain spiral line (called forming angle)， and then welding the pipe seam. It can produce large-diameter steel pipe with narrow strip steel. Spiral welded pipe is mainly used for oil and natural gas transportation pipeline， and its standard is expressed by outer diameter * wall thickness. Spiral welded pipe has single-sided welding and double-sided welding. The welded pipe shall ensure that the hydrostatic test，Products Show tensile strength and cold bendingof the weld meet the requirements.
OaWhen excavating a tunnel in a stratum where the rock is not hard and complete， it is generally necessary to excavate a diversion pit (also known as pilot hole) and set temporary support.
The development of steel mesh has met the soft and hard conditions.
In our daily life and work， we can often see a lot of steel products. At the same time， among many steel products， the application of galvanized pipe is more frequent. Let&#;s discuss the application scope of this kind of pipe today.
jWhether I-section steel is ordinary or light， because the section size is relatively high and narrow， the moment of inertia of the two main axes of the section is quite different， so it can only be directly used for members bent in the plane of their web or form lattice stressed members. It is not suitable for axial compression members or members with bending perpendicular to the web plane， which makes it very limited in the scope of application. I-beam is widely used in buildings or other metal structures.
ZIdler pipe: it is used for electric welding steel pipe of idler of belt conveyor. It is generally made of Q QA， B steel and steel，Products Show with a diameter of -mm. There are certain requirements for pipe tortuosity， end face straightness with the center line and ovality. Generally，Daniel FloresAlloy pipe gh 8Mainly in which areas water pressure and flattening tests are carried out.
LdiscountThe reinforcement mesh of the maintenance platform has the characteristics of extensive application， beautiful style， convenient installation and durability， Skirting plate (edge guard plate)， checkered plate guard plate， installation of connectors and other accessories can be added around. The reinforcement mesh is suitable for the reinforcement mesh manufactured in the factory and welded with cold-rolled ribbed reinforcement or cold-rolled smooth round reinforcement. The welded reinforcement mesh for reinforced concrete is a good and efficient material for concrete distribution. Flat steel with different specifications can be used for edge wrapping， Or wrap edges with angle steel， channel steel，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd square tube， etc; Handles and hinges can also be installed on the reinforcement mesh that needs to be moved or opened frequently.
xLThin wall steel pipe， thick wall steel pipe.
The advantage of the reinforcement mesh system is ecological. It is filled with natural stone materials. There is a gap between the stone materials to allow plants to grow in it. It can also plant plants on it. It has the dual effects of engineering slope protection and plant slope protection. The Ecological Grid mat is a combination with a height of cm ~ cm， mostly a multi grid box separated by spacer mesh.
General welded pipe: General welded pipe is used to transport low-pressure fluid. It is made of qa， qa and QA steel. It can also be made of other mild steel that is easy to weld. Water pressure， zigzag， flattening and other tests shall be carried out for steel pipes， and there are certain requirements for surface quality. Generally， the delivery length is -m， and fixed length (or double length) delivery is often required. The standard of welded pipe is expressed in nominal diameter (mm or inch). The nominal diameter is different from the actual. Welded pipe can be divided into general steel pipe and thickened steel pipe according to the specified wall thickness， and steel pipe can be divided into threaded and non threaded according to the way of pipe end.
resourceswWhen excavating a tunnel in a stratum where the rock is not hard and complete it is generally necessary to excavate a diversion pit (also known as pilot hole) and set temporary support.
RThe sodium cyanide passivation treatment of alloy pipe can be divided into four categories. Before passivation treatment， the surface of alloy pipe shall be clear of oil stains， pickled and passivated. Passivation treatment can be carried out only after the surface is cleaned， and the workpiece of alloy pipe products can be infiltrated into aqueous solution. The passivation treatment of the alloy tube in sodium cyanide transforms the surface layer into a very thin passivation treatment film， and the reproducibility of the solution is good.
Packaging: Welding nets are generally packaged in paper (mostly gray white， etc.)， some similar to welding wire diameter welding nets， agriculture， construction， transportation， mining and other industries. Such as machine shields， animal fences， flower and tree fences， window fences， aisle fences， poultry cages， baskets and decorations.
aCuba Carbon: the higher the carbon content the higher the hardness of steel， but the worse its plasticity and toughness
cDThere are many types of galvanized pipes， mainly including cold plated seamless pipes and hot-plated seamless pipes. But now the previous one is no longer used. The hot-dip seamless tube is still in use. Hot dip galvanized pipe is mainly used for steel pipes with low pressure fluid such as water and gas. When in use， if in normal working environment， the thickness of galvanized layer of hot-dip galvanized seamless steel pipe is up to μ M above and it has been used safely for about years. It can be seen that its service life is very long. Of course， when purchasing， we should also find regular manufacturers to order. Only in this way can we achieve this service life. As long as the galvanized pipe is cleaned after pickling， it is basically cleaned in ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank. In order to ensure the quality， electro galvanizing will not be used. There are also some small enterprises in the market. They will use electro galvanizing in production. In this way， although it is much cheaper in price. However， the quality is very good when used， and it is also easy to have problems.
The reinforcement mesh is used for embankment protection or for the protection of the whole riverbed and river bank， which is more suitable for the river channel with relatively gentle original bank slope. Taking the design dry water level as the boundary， the upper part is slope protection works and the lower part is foot protection works.