The price of the line pipe

　　We are a factory of steel pipes. Such as ASTM 106 Grb  line pipe, API5L Grb steel pipes etc. I had quoted to our clients for  line pipe. Because it is a tender so need long time to make the decision. But our  line pipe since Sep. to now each ton had increased 400 RMB per ton. It will be a big gap between the current price and the quoted prices. So I have to contact our clients to give the news of increasing rate.  It is our duty and this is our service. And the customer have the right to know the prices timely.