Underwriters Laboratories (ul)

Strategic 5 main branches (Product Safety, Environment, Health, universities and Validation Services) that operates independent international engineering and a security company.

Factory Mutual (FM)

Basically, fire, natural disasters and to protect against similar risks in providing engineering solutions is one of the world's largest insurance companies. FM approvals: FM Approvals, FM Global companies that certify products and services for industrial and commercial unit.

Bending Moment Resistance

Torque tests, samples are applied to the system created in conjunction with fittings attached to the ends of. Pipe ends, couplings is prepared specifically by the manufacturer. In the end fittings are specially prepared, applying pressure values for testing set; the bending moment under pressure are examined. This test is done to test the strength of pipes and fittings under a given load. The pipes under the pressure of the strength of the connection is tested.

Bending Moment Resistance Of Rotation

For each nominal pipe size to be considered for approval and eligibility is verified by this test method mounting of the groups tested. Under nominal operating pressure of the device that is prepared with approved fittings montajlanar of rotation that is applied bending moment prior to, during, and after no leakage, cracking, breaking or deformation of the pipe, without basinclandirili remain sealed while the nominal operating pressure is verified.

Hydrostatic Strength

In this test, using multiple links for the same along the length of the pipe or separate assemblies for each combination method is made. Is subjected to the hydrostatic test of four times the nominal operating pressure pipe fittings. Each of the hydrostatic pressure test is done over a period of five seconds.

Vibration Resistance

Vibration resistance test of eligibility toat least one sample from each type is tested and verified the installation. Prepared test gear, under hydrostatic working pressure nominal; stroke increased gradually with increase in the period of the vibration is determined 5 hours 5 is exposed to vibration. This 25-hour, no leakage or other malfunction during a test are not permitted. Then, the hydrostatic strength test, vibration test is repeated after each sample group. The absence of leakage or other malfunction is verified.

Durability Marking

Pipe markups product identification to ensure that storage, transport and must remain legible under normal conditions of use. For this reason, the suitability and durability of marking of the pipe portion of the region branded net approximately 450 mm in length, immersed in water for five minutes once a day for 10 working days is verified by. This process is repeated daily, routinely, samples were removed from the water once it is dried by wiping the area with paper towels or cotton wet surface marking. It is not spread towels on branding, unknown if he doesn't leave residue or 10-day exposure to water after the completion of the test, the specimen marks on petroleum-based grease should be coated with and kept intact for 24 hours. After this period, the oil is freed from the sample surface by wiping with a paper towel or cotton. The erasure in the sign of the pipe, without staining or any other disassembly is verified.

Corrosion-Resistant Coatings

Hot dip galvanized coatings coated pipe for all sizes by examining the samples for which compliance is verified. After coating the samples full-length is cut from a pipe. From the free end and two full-length sample length of about 600 mm from the center of the pipe, for a total of three samples are taken. Measurements at equal intervals around the outer diameter, is made at a distance of approximately 100 mm from the end. NPS 2 (DN50 – 60,3 mm) around the outer diameter of the pipe requires a minimum of four measurement, and smaller NPS 2 (DN50 - 60,3 mm) larger than the size of the pipes, must be a minimum of six measurements. The sample tubeis made regardless of the standard, each sample average of 77 microns (55 g / m2 ) coating thickness should show. The coating thickness is measured at each point 64 microns (0,46 kg / m2 ) should not be less.

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