ID15 Scaffolding
Shoring tower is an effective supporting system. It is easy to assemble and dismantlement, and has excellent stability and bearing capacity. It has been widely used in the construction of industry & residential buildings, bridges, tunnels and dam project, etc.
Characteristics:
Simple & flexible structure.
Easy for asembling
- Cup lock Scaffolding(C-Lock Scaffolding)
- Ring lock Scaffolding
-Kwistage Scaffolding
-H-frame Scaffolding
-ID15 Scaffolding Tower, this type Scaffolding is the most widely used in construction, such like bridge.
-Whole Aluminum Scaffolding
Id15 Scaffolding,Scaffolding 15 Feet,15 Feet Scaffolding,15' High Scaffold HENGSHUI PIONEER IMP & EXP TRADING CO ., LTD , https://www.hspioneer.com
For its development, it is necessary to control the chemical composition design, steel-making, rolling, and heat treatment to ensure its low temperature impact toughness and corrosion resistance. specifically is:
1. The chemical composition of composition design is designed as w(C)=0.06-0.12%, w(Mn)=0.4-0.6%, w(S)≤0.005%, w(P)≤0.012%, w(Ni)= 3.4 to 3.6%.
2. Steelmaking 1) Control C content. The matching of the electric furnace and refining is an effective means to achieve accurate control of the C content. The C content at the end of the smelting of the electric furnace is strictly controlled. The furnace temperature refining is performed by increasing the flow rate of the argon gas and the diameter of the dipping pipe on the VD or RH furnace, and by blowing oxygen. Remove C from the vacuum so that the exact C content requirement is guaranteed.
2) Reducing P and S content By using high-quality scrap steel and scouring slag of appropriate composition to meet the need of stripping, high alkalinity slag is made in the electric furnace and the steel slag is strictly controlled to reduce the P content in the steel.
3) To ensure the Ca content in the steel and the weak stirring time, to strengthen the connection management between the upper and lower heat of continuous casting, and to protect the casting, can effectively reduce the non-metallic inclusions in the steel.
3. Rolling adopts PQF tandem rolling mill unit to carry out rolling, and adjust the heating temperature and time of the tube blank, reduce the eccentricity in the perforation process, and reduce the uneven wall thickness.
4, heat treatment low temperature seamless steel pipe is best to use normalizing or quenching process. For slender pipes, if the water quenching and tempering process is used, bending tends to occur, and if the normalizing or normalizing + tempering process is adopted, it is more suitable.
This information source
3.5Ni low-temperature seamless steel tubes have relatively moderate strength and good low-temperature toughness, and are widely used in the manufacture of cryogenic equipment in the oil, chemical, fertilizer, and other industries with working temperatures of -45 to -101°C. The two main indicators of low temperature piping are low temperature toughness and corrosion resistance.