All propane cylinders will have a TW stamped in the valve protection ring. The tare weight or TW is the weight of the cylinder empty. TW 18 would be a 18 pound empty cylinder. â¦ If you weigh a TW 18 cylinder on a bathroom scale, and it weighs 28 pounds there would be 10 pounds of propane remaining in the cylinder.ll propane cylinders will have a TW stamped in the valve protection ring. The tare weight or TW is the weight of the cylinder empty. TW 18 would be a 18 pound empty cylinder. â¦ If you weigh a TW 18 cylinder on a bathroom scale, and it weighs 28 pounds there would be 10 pounds of propane remaining in the cylinder.
Although it is passed down from parents to children, about 1/3 of cases are caused by a spontaneous mutation, a change in a gene. According to the US Centers for Disease Control and Prevention, hemophilia occurs in approximately 1 in 5,000 live births. There are about 20,000 people with hemophilia in the US. All races and ethnic groups are affected. Hemophilia A is four times as common as hemophilia B while more than half of patients with hemophilia A have the severe form of hemophilia.
There are thirteen clotting factors and they all work in sequence to help form a clot. The type of clotting factor that is missing determines what kind of hemophilia you have. The two most common types arehemophilia Aand hemophilia B. In hemophilia A, the missing clotting factor is factor VIII. Hemophilia Ais sometimesreferred to as classical hemophilia. In hemophilia B, the missing clotting factor is factor IX. Hemophilia B is sometimesreferred to as Christmas disease.