China on Friday accused the US of protectionist and biased trade policies less than a week before president Barack Obama’s first visit to Beijing.

In a stinging rebuke to Washington, China’s commerce ministry promised to take measures to protect its domestic industry after the US slapped anti-dumping duties on $2.6bn of Chinese steel pipe imports. The duties are part of a growing roster of trade conflicts between the two countries, despite a high-level meeting last week in China aimed at reducing tensions.