We received a complaint from Shenzhen Shengyi the other day, they claimed there were roll length shortage in 23 rolls of HDF200 among the 105 rolls received for Xiaping landfill project under SO-004257. The 23 rolls were measured in the daytime of Feb. 25, ambient temperature 16-20°C. They did not make any linear measurements prior to these 23 rolls and rest of the material have not unrolled and used yet. Please see attached their report.
We understand that our roll lengths have a tolerance of ±1%. But unfortunately from their record we did not find any positive deviation.
We also understand the thermal expansion/contraction of the sheet, as per calculation, the max. contraction under such condition would be around 180mm.
So please help to check the manufacturing record before we could formally reply to Shengyi.