The US Commerce Department has imposed anti-dumping tariffs of up to 99% on imports of Chinese tubular goods.The department alleged China had been selling its oil well pipes at prices that were much lower than normal. The announcement is the latest in a series of trade disputes between the US and China, which called the move an "abuse of protectionist measures". The move comes 10 days before President Barack Obama is due to make his first visit to China since taking office. He will be in China f