31. Its flammability limits are 1 and 6 percents. 32. Hazards include flammability after vaporization into a gaseous state, freezing, and asphyxia. 33. One of the reasons for that is the mild flammability of HFO-1234yf. 34. Last year the board also sensibly recommended a reduction in the flammability of fuel vapors. 35. RFNA increases the flammability of combustible materials and is highly exothermic when reacting with water. 36. It can present a hazard in manufacturing industries, especially in terms of its flammability . 37. During the investigation the issue of the flammability of passengers'clothing materials came up. 38. All of these materials were treated with calcium chloride to try to reduce their flammability . 39. You would ( of course ) test materials for flammability as part of the project. 40. Here, further fire tests are involved in quantifying the degree of flammability or combustibility.