BS EN ISO 27509:2020 pdf download.Petroleum and natural gas industries — Compact flanged connections with IX seal ring.
6 Designation
6.1 Designation of flanges
The flanges shall be designated with the following Information (based on guidance In EN 1092-
1:2018.4.2):
a) flange type abbreviation in accordance with Tahle2:
b) reference of this document, I.e. Iso 27509;
c nominal flange size (ON);
d) pressure class designation;
e) pipe dimensions:
— for standard pipes, the wall thickness In mm to one decimal accuracy;
— for non-standard pipes, the pipe bore and wall thickness.
Ii material designation,
The designation elements shall be separated by a slash. The number olcharacters Is not fixed.
Examples of designation are given below:
EXAMPLE I Desigliatlon of WN flange In CL 600. nomInal size ON 250 with pipe schedule 4S. I.e. 9.3mm wall
thlcknes and material ASTM AI82FS1 (duplex):
WN/ISO 27509/DNZ5O/CL600/9,3/A182F51
EXAMPLE 2 For designation of a BL flange in CL 2500, nominal size tIN 200 and with material ASTM A516 Grade 70(10w temperature carbon steel):
IlL/ISO 27509/DN200/CL2500/A5l6Grade7O
EXAMPLE 3 Designation olan RT flange in CL900. nominal size DN 25, threaded outlet specified (0.5 inch NPT is default, see 9.9), and with material ASTM A182F316 (stainless steel):
RT/lSO 27509/DN25/CL900/0,5”NPT/A182F316
6.2 DesignatIon of seal rings
The IX seal ring shall be designated as described below:
a) reference of this document, I.e. ISO 27509;
b) type. and ring size IX and the appropriate ON;
c) material designation.
The designation elements shall be separated by “/ (slash). The number of characters Is not fixed.
7.2 Flange materials Flanges covered by this document shall be made from base material product forms as listed in Table 2. The standardized bevel angle as described in 5.2 is applicable for steel and nickel alloys, which are covered in this document. It is assumed that the flange material has a Young's modulus in the range 190 000 MPa to 210 000 MPa at room temperature. Minimum specified yield strength for flanges to this document is 205 MPa at room temperature. For flanges with H W3 > 150 mm, the minimum specified yield strength is 300 MPa. The elliptical transition between flange ring and flange neck of WN flanges, and the corresponding crotch transition of IF flanges shall be subject to 100 % surface examination irrespective of flange material. Examination method and acceptance criteria shall be in accordance with standards referenced in the applied Piping Design Code. Materials shall be ultrasonically tested in accordance with ASME VIII div. 2. This requirement is applicable to all flange components made from forgings, forged bars and plates.BS EN ISO 27509 pdf download.