It is reported, prestressed concrete steel wire products in 1996, the first included in the national product quality supervision and spot checks, a total of 7 times in selectiving examination. Most companies selectiving examination 3 quarter in 2014 to reach 50; 3 quarter of 1996 sampling companies, at least for 12. Spot enterprises from 1996 to 2007 in pass rate was 100%, 3 quarter of 2009 sampling percent of pass is 97.8%, 2013 3 quarter sampling percent of pass is 98.0%, and the provisions for extension force major non-conformance is unqualified. 3 quarter of 2014 sampling percent of pass is 100%.

All previous spot check showed that each performance index of prestressed concrete steel wire products pass rate at a higher level. Prestressed concrete steel wire products production in China in a better control, better product quality overall.