EUROPEAN STANDARD. NORME EUROPÉENNE. EUROPÄISCHE NORM. EN December ICS ; ; Flanges and their joints — Bolting Part 4: Selection of bolting for equipment subject to the Pressure Equipment Direc. Norma numero: EN Titolo: Flanges and their joints – Bolting – Part 4: Selection of bolting for equipment subject to the Pressure Equipment.
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Checking of the proper fitting of the threads while assembling the bolts and nuts is recommended.
According to this, e. Limits of sizes for hotdip galvanized external screw threads to mate with internal screw threads tapped with tolerance position H or G after galvanizing  ISOISO general purpose metric screw threads — Tolerances — Part 5: For maximum suitable temperature see EN Depending on the coating used, a verification of the temperature ranges given in Table 3 may be required.
The coating process is under the responsibility of the bolting manufacturer and shall take into consideration achievement of the mechanical properties of bolting, as appropriate.
This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by Juneand conflicting national standards shall be withdrawn at the latest by June The use of free-cutting steel is rn permitted. Inchiesta pubblica preliminare UNI: A threading before galvanization followed by a re-tapping step should be avoided due to the risk of “double-threads”.
BS EN 1515-4:2009 Flanges Bolting
According to this, e. Leggere attentamente le istruzioni prima di effettuare il download. It specifies standards and additional requirements for dimensions, materials and technical conditions of delivery for bolting.
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The purchaser shall ensure that the coating to be used for the bolting is appropriate for the foreseen service conditions. Report “BS EN Test method  ENUnfired pressure vessels — Part 2: E BS EN Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. For nuts, the inspection certificate or the test report shall contain at least the following: NOTE 1 Deviations from increments given may be agreed between purchaser and bolting manufacturer.
EN – Flanges and their joints – Bolting – Part 4: Selection of bo –
Consequently the technical data stated in the material standard shall be assessed against the design requirements of this specific item of equipment to verify that the ERs of the PED are satisfied.
The 1155-4 are stepped by increments of 5 mm for length up to 80 mm, by increments of 10 mm for length above 80 mm and up to mm, and by increments of 20 mm for length above mm. Nuts should be obtained, preferably, by forging. The internal thread of the nut will usually be 15155-4.
BS EN Flanges Bolting – Free Download PDF
Concerning the connection between inspection certificate type 3. Nuts with specified proof load values — Coarse thread ISO Wherever the starting material standard provides mechanical properties for this temperature range respective reference is made in Table 3.
The points shall be chamfered or rounded at the bolting manufacturer’s option. Details and advice can be obtained from the Copyright 15515-4 Licensing Manager.
BS EN 1515-4:2009
InTable 4, footnote a reference to EN is added to clarify testing requirements. Size px x x x x When bolting is used as: Once this standard is cited 151-54 the Official Journal of the European Union under that Directive and has been implemented as a national standard in at least one Member State, compliance with the clauses of this European Standard given in Table ZA.
We need your help! BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Starting material shall comply with EN Kind of pre-treatment of bars is at the responsibility of the bolting manufacturer.