* LME/ShFE arb: http://bit.ly/2wZSAEz (Adds official prices, adds China scrap)
LONDON, Oct 16 (Reuters) - Copper prices broke through the $7,000 a tonne mark for the first time in three years on Monday as a number of pieces of economic data, including from top consumer China, fuelled optimism about demand.
Copper jumped 2.9 percent to $7,082 per tonne in official London Metal Exchange trading rings, after touching an August 2014 high of $7,111.50 a tonne. Prices are up about 28 percent year to date, on track for the biggest annual gain since 2010.
"The price increase itself has ignited also yet another price rally based on expectations for higher prices," said Eugen Weinberg, head of commodities research at Commerzbank.
But he warned that prices could have over-reached and were due for a pullback.
"It's very difficult to time overheated situations such as these but we definitely expect prices to come back before another increase. The price is very speculatively driven in our opinion."
CHINA DATA: China's producer price inflation unexpectedly accelerated to a six-month high in September as a construction boom showed no signs of abating and a government crackdown on air pollution triggered fears of winter shortages.
CHINA COPPER: China's unwrought copper imports surged by 26.5 percent in September from a year ago, customs data showed on Friday, but remained on course for an annual drop in 2017.
CHINA ECONOMY: China's economy is expected to grow by 7 percent in the second half of this year, the country's central bank governor said, defying economists' expectations for a slowdown.
INVENTORIES: Stocks of copper in LME-approved warehouses edged up by 1,225 tonnes but fresh cancelled warrants - metal earmarked for delivery - slipped 3,950 tonnes to 210,475 tonnes.
DEMAND: Global steel demand is expected to grow by 7 percent year-on-year to reach 1.622 billion tonnes in 2017, driven by growth in China, the World Steel Association said on Monday.
Higher steel demand benefits base metals where their uses range from galvanising steel to corrosion resistance.
Copper's next major technical resistance into $7,150/$7,200, basis November 2014 highs, Marex Spectron's Alastair Munro said, adding that today's range was the widest since early September.
SCRAP: The market was keeping an eye on reports that China is enforcing some restrictions on copper imports, including scrap, traders said.
PRICES: Aluminium traded up 1.2 percent at $2,159 per tonne, zinc rose 0.8 percent to $3,260.50, lead was bid up 1.8 percent at $2,575 a tonne, tin edged up 0.4 percent to $20,675 while nickel was bid 1.5 percent higher at $11,855.
(Addditional reporting by Melanie Burton in Melbourne, editing by David Evans)