Producing steel tubes is d job of bring pollution ,not only d river ,but also air ,being damage for people's health, therefore it has to to deduct capacity of steel manufacture and close d steel /HDG factories ,of which have gonna walk far away from standard in d environment law .Unavoidable ,price goes up rapidly ; But if it was falling down, i shall tell you in time ;frankly speaking, i do expect to buy cheaper raw material either, being patient pls.