B型袋由绝缘抗静电织物制成，但击穿电压小于6 kV。该规定可防止高能传播刷放电的风险，刷放电可点燃粉尘-空气混合物、易燃气体和溶剂蒸汽。B型袋可在存在MIE大于3mJ的可燃粉尘的情况下使用，但仅在没有可燃气体蒸汽的情况下使用。B型袋有时称为防静电袋，但应注意，B型袋仅提供有限的防静电保护，不提供任何静电消散机制。

　　Type B bags are constructed from insulating fabric but have a breakdown voltage less than 6 kV.This provision prevents the risk of energetic propagating brush discharges which can ignite dust-air mixtures and flammable gases and solvent vapors.Type B bags may be used in the presence of the combustible dusts with MIE of greater than 3mJ,but only in the absence of flammable vapors of gases.Type B bags are sometimes called antistatic bags,but it should be noted that Type B only provides limited protection against static electricity and they do not provide any mechanism for dissipating static charge.