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Firstly, before production, we send sample for confirmation.In production, we send pictures to clients to let clients know production progress.After goods finished, we send pictures to clients, and after finish production, we send pictures to clients.All above documents and pictures will be on file.When we get clients' feedback, we have after-sale service team to solve questions, and talk with engineers to find out reason and root cause to supply the best products to our client.

5 pcs for board. 1 set for furnace chamber.We accept trial order.

Firstly, our products always have good feedback in domestic and abroad market,Before you order our boards, we send one small piece of board with same quality in bulk production to make test and confirmation.We will make some change in production if you have extra requirements.

We supply furnace chamber according to clients' drawing, including high temperature furnace chamber and electric resistance furnace chamber, working temperature can be supplied from 1000C-1800C. We have experts to give out the best and effective chamber installation way, and we have technology team to make drawings according to your need. 

Regular size is 900x600x25mm, 900x600x50mm. Thickness can be made from 100mm to 150mm. Meanwhile, it can be supplied according to clients' requirements.

According to Classification Temperature, our boards are divided to 1400C, 1600C, 1700C, 1800C fiber board. Its operating temperature is 1250C, 1450C, 1550C and 1650C seperately. 

ASTM A653 is the American standard for the galvanized steel.The Grade 340 means the Yield strength of the galvanized sheet will be 340Mpa or more.   

For the galvanized corrugated steel sheet in 0.20mm*800mm.800mm is the width after corrugation, generally, the most of clients need the length in 1800mm, 2440mm, 3000mm or 3600mm etc0.20mm*800mm*1800mm          about 390 pieces per metric ton0.20mm*800mm*2440mm          about 290 pieces per metric ton0.20mm*800mm*3600mm          about 196 pieces per metric ton

For the galvanized corrugated steel sheet in 0.20mm*900mm.900mm is the width after corrugation, generally, the most of clients need the length in 1800mm, 2440mm, 3000mm or 3600mm etc0.20mm*900mm*1800mm          about 353 pieces per metric ton0.20mm*900mm*2440mm          about 261 pieces per metric ton0.20mm*900mm*3600mm          about 176 pieces per metric ton

Generally, there are two kinds of cold steel sheet, annealed and unannealed.In using, there are several kinds, like commercial quality, drawing, deep drawing and construction use. 

For the cold steel coils we supply, the grade is Q195, SPCC or SAE 1008  

For the coil ID of the galvalume coils, it will be 508mm or 610mm. 

For the coil ID of the galvanized steel coils, it is 508mm or 610mm.

For the coil OD of the prepainted steel coils, it is relavant with the coil weight of the prepainted steel coils,Generally, the coil OD is 1000mm-1100mm.