Iron pipe fittings chart

In addition, Ductile Iron Pipe manufactured under this standard are required to meet a minimum of 7 ft lbs impact resistance by the Charpy test. The flat surface of the boss, along with the increased metal thickness, provides for multiple thread engagement of tap sizes larger than could be accommodated on the curved surface of the fitting. See the table below for dimensions for the above fittings. Compare Gray Iron Pipe with an impact resistance of approximately 2 ft lbs or less. Other names for ductile iron are nodular iron or spheroidal graphite iron. Restrained push-on joints manufactured by U. A column of liquid moving through a pipeline has momentum or force that tends to separate the joints at changes in direction bends and tees , stops plugs, caps, or closed valves , and changes in size reducers.

The largest opening establishes the basic size of a reducing fitting. This type of joint restraint is generally labor intensive. This mortar is applied to the cutout area and troweled smooth with adjoining lining. Answer the following question: What is fifteen divided by three? The smaller containers are less likely to be contaminated with dirt, pebbles, or other foreign matter, which, if trapped between the pipe and gasket, could result in a joint leak.

Of course, in potable water-related applications, no patch or curing components should be used in the repair that would negatively affect health or water quality. Other names for ductile iron are nodular iron or spheroidal graphite iron. This type of joint restraint is generally labor intensive. You do want to ensure that there is adequate thread engagement to provide both strength and a leak-free seal. Both require significantly more time and effort to install than U.

Repair is achieved by first cutting out the defective or damaged lining to the metal so that the edges of the lining not removed are reasonably perpendicular to the pipe wall or slightly undercut. Since polyethylene encasement for external corrosion protection reduces the friction between the pipeline and the surrounding soil, the calculated restrained footage is usually multiplied by a factor of 1. There are a number of reasons why the mold has this peen pattern. You do want to ensure that there is adequate thread engagement to provide both strength and a leak-free seal. However, if the wall thickness is insufficient for the required size and angle of tap, a tapping boss is provided on the fitting.