中华人民共和国国家标准
PVC塑料窗建筑物理性能分级（节录）
GB 11793.1-89
3 性能
3.1 依据不同建筑物的使用要求，按抗风压、空气渗透、雨水渗漏三项性能指标，将产品划分为A、B、C、三类（见表1）
表1
类  别 等  级 性  能  指  标
  抗风压性能
/Pa ≥ 空气渗透性能
（10Pa下）/（m3/(m•h)）≤ 雨水渗漏性能
/Pa ≥
The People's Republic of China national standard
Physical properties of PVC plastic window construction grade (excerpt)
GB 11793.1-89
3 Performance
3.1 according to different use of the building requirements, according to wind pressure, air infiltration, water leakage in the three performance indicators, the products are divided into A, B, C, three categories (see Table 1)
Table 1
Category-level performance indicators, etc.
  Performance of wind pressure
/ Pa ≥ air permeability
(10Pa under) / (m3 / (m • h)) ≤ rainwater leakage performance
/ Pa ≥