BS EN 14628-1 pdf free download

BS EN 14628-1-2020 pdf free download.Ductile iron pipes, fittings and accessories — Requirements and test methods Part 1: PE coatings.
The uncoated spigot length “a” depends on the type of joint. It is the responsibility of the manufacturer to define the appropriate uncoated length for each type of joint. The front end of sockets may be uncoated on a length “b” depending on the application method (see informative Annex B): — tubular extrusion: < 5 mm, (15 mm after storage outside); — flat die wrapping extrusion: < 50 mm. The pipe ends surfaces not covered by the polyethylene coating (spigot, front end of socket and internal section of socket) shall be coated with suitable coating(s) according to EN 545. Where such coatings are in contact with water intended for human consumption, these shall comply with the relevant requirements stated in the introduction of this document. NOTE The pipe parts not covered by PE will be protected after laying using appropriate measures, e.g. heat shrinkable sleeves, which are in compliance with EN 545, EN 598 or EN 969.
5.4 Repairs In case of holidays or damage, repairs shall be carried out in accordance with the manufacturer’s written instructions. All repairs shall subsequently meet the non‑porosity test requirements.
5.5 Marking All pipes shall be marked legibly and durably according to the pipe standard EN 545, EN 598 or EN 969 with the addition: PE-A, PE-B, PE-C, PE-D, PE-E, PE-F, PE-G or PE-H (see 4.3). The transported medium can be denoted by appropriate markings, e.g. by coextruded coloured stripes.
5.6 Peeling strength Experience with the transport, laying and operation of polyethylene‑coated pipes and pipelines has shown that good bonding is necessary in order to avoid mechanical damage. It is, however, not necessary to ensure the corrosion protection properties of polyethylene coating if the thickness and the quality of the coating comply with the requirements of this document. When tested in accordance with method 1 as defined in 7.1.2, the adhesive shall be selected in order to provide a mean peel resistance of at least 10 N per cm strip width (zinc or zinc-alloy coating with or without finishing layer) or 20 N per cm strip width (oxide skin) of polyethylene coating. When tested in accordance with method 2 defined in 7.1.3, the peeling time shall be at least 0,04 DN in minutes. The mean peeling rate is thus 10 mm/min.
5.7 Non-porosity The polyethylene coating shall be free from pores extending through the coating, so, no electrical puncture shall occur according to the test method defined in 7.3. 6 Performance requirements 6.1 Impact strength The minimum impact strength shall be determined in accordance with the test method defined in 7.4. The number of electrical punctures in the test shall be confined to range A as defined in Figure 2.
6.2 Indentation resistance
The indentation resistance shall be assessed by testing in accordance with the test method defined in 7.5.
The indentation depth of the polyethylene coating shall not exceed 0,3 mm.
6.3 Elongation at break
The elongation at break shall be assessed by testing in accordance with the test method defined in 7.6.
The elongation at break for polyethylene coating shall be at least 200 %.
Ten specimens taken from at least five different pipes shall be subjected to this test.
The maximum allowable failure rate shall be one specimen out of ten. If the result does not comply with the requirements, a second test with ten specimens shall be carried out without any failure allowed.BS EN 14628-1 pdf download.