Steel pipe with complex section -- unequal hexagonal steel pipe， five petal quincunx steel pipe， double convex steel pipe， double concave steel pipe， melon seed steel pipe， conical steel pipe，Products Show corrugated steel pipe，مونتريال45 تي الدقة سلس الأنابيباتجاه التنمية منخفضة الكربون watch case steel pipe and others.
5 The weight of seamless pipe is light， and its weight is only one fifth of that of anti steel.
hvictoriaI-beam also known as universal beam， is a long strip of steel with I-shaped section. I-beam is divided into ordinary I-beam and light I-beam. It is a section steel with I-type section shape.
How to judge the quality of seamless pipe?
HcorkThe two ends of the steel produced by the seamless pipe manufacturer shall be cut into right angles， and the burrs on the surface shall be removed， which is the raw material used by the seamless pipe manufacturer. The embryo prototube embryo needs to be cut by a cutting machine to form an embryo material with a length of about one meter which is sent to the furnace for heating through the conveyor belt. The billet is sent to the furnace. After internal heating， the temperature is about degrees， and the fuel used is often ethyne. Temperature control in the furnace is a very key factor.
HrGalvanized pipe can be seen from its name. It is a square pipe type. Many materials can form galvanized pipe body. It is used for what purpose and where. Most galvanized pipes are steel pipes. After unpacking， leveling， crimping and welding，Products Show they form round pipes， which are rolled into square pipes， and then cut into the required length. Generally， there are galvanized pipes in each package. In terms of spot， most of them are in large specifications， ranging from * * .- to * * - Galvanized pipes are divided into structural galvanized pipes， decorative galvanized pipes， architectural galvanized pipes， mechanical galvanized pipes， etc.
On the other hand，Products Show when the steel structure changes during heat treatment， that is，مونتريال45 تي الدقة سلس الأنابيباتجاه التنمية منخفضة الكربون the increase of specific volume will be accompanied by the expansion of workpiece volume， and each part of workpiece will undergo phase transformation successively， resulting in inconsistent volume growth and structural stress. Due to the change of tissue stress， the tensile stress on the surface and the compressive stress in the heart are just opposite to the thermal stress. The magnitude of microstructure stress is related to the cooling rate， shape and chemical composition of martensitic transformation zone materials.
Welded steel pipe， also known as welded pipe， is a seamless steel pipe made of thick steel plate or hot-rolled strip by electric welding after coiling and forming， generally with a fixed length of m. Welded steel pipe has the advantages of simple production and processing process，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd many types， specifications and models， and less investment in machinery and equipment projects， but the general compressive strength is less than that of seamless pipe.
fThe pickling agent in the pickling process contains many acidic substances， including hydrochloric acid， etc.， which has strong corrosion and reduction， and the temperature of etching substances is relatively high. Therefore， the corrosion resistance of alloy pipes is specified higher.
AGalvanized pipe is actually galvanized pipe. This is mainly because it increases the corrosion resistance of the steel pipe， so it is evenly coated with a layer of zinc. It can prevent the erosion of other chemicals such as and steam， and protect the steel strip. It is non-destructive and effectively prolongs its service life. Generally， the steel strip purchased is rolled into a large number by the galvanized pipe manufacturer， so pay attention to it during storage.
PPromotionGalvanized pipe is actually galvanized pipe. This is mainly because it increases the corrosion resistance of the steel pipe， so it is evenly coated with a layer of zinc. It can prevent the erosion of other chemicals such as and steam， and protect the steel strip. It is non-destructive and effectively prolongs its service life. Generally， the steel strip purchased is rolled into a large number by the galvanized pipe manufacturer， so pay attention to it during storage.
wJAccording to the section shape， the steel pipe is divided into:
During the construction of building wall， cracks and hollows show that the construction materials are unqualified， the construction at the matrix junction is not in place， and the construction personnel are poor. The external wall plastering adopts electric welding steel wire mesh， which can prevent cracking and strengthen the wall.
. the straight length of the hook of the surface mesh reinforcement at the grid support shall not be less than mm， and the bending diameter shall not be less than D (D is the reinforcement diameter).
Direct materialqDuring the construction of building wall， cracks and hollows show that the construction materials are unqualified the construction at the matrix junction is not in place， and the construction personnel are poor. The external wall plastering adopts electric welding steel wire mesh， which can prevent cracking and strengthen the wall.
ZI-beam is mainly used in building structure， curtain wall engineering， hot-plated parts can be formed by cold stamping， rolling， wire drawing， bending and so on without damaging the coating;
avictoriaSteel transfers heat excellently; Can withstand high temperature; Strong and strong materials; Probably a long time ago. In addition， there is the low cost of metal.
nI The end span plate is connected with the load-bearing wall. The length of the surface mesh extending into the grid support shall not be less than mm and a transverse reinforcement shall be provided at the end of the mesh or the extended reinforcement shall be bent.
The fourth is the welding process method to ensure the strict implementation of the special operation method of galvanized pipe. The welding process includes pre welding groove inspection， control of welding process parameters and operation methods， post welding appearance quality inspection， and post welding nondestructive testing if necessary. Control the welding level and the amount of welding materials at each crossing.