The ASME B16.5 standard governs the specifications for pipe flanges and flanged fittings used in various piping applications. This standard is widely recognized in industries such as oil and gas, petrochemicals, power generation, and water treatment, ensuring safe and reliable connections in piping systems.
ASME B16.5 Standard Pipe Flanges Dimensions:
ASME B16.5 Weld Neck Flange Dimensions (150lb-2500lb)
ASME B16.5 Slip On Flange Dimensions (150lb-1500lb)
ASME B16.5 Blind Flange Dimensions (150lb-2500lb)
ASME B16.5 Socket Weld Flange Dimensions (150lb-1500lb)
ASME B16.5 Lap Joint Flange Dimensions (150lb-2500lb)
ASME B16.5 Threaded Flange Dimensions (150lb-2500lb)
Haihao Group forged flanges engineering department,design,produce,inspect and supply our forged flanges according to the ASME B16.5 standard.The following is a detailed description of ASME B16.5 standard:
- 1. SCOPE
- 2. PRESSURE-TEMPERATURE RATINGS
- 3. COMPONENT SIZE
- 4. MARKING
- 5. MATERIALS
- 6. DIMENSIONS
- 7. TOLERANCES
- 8. PRESSURE TESTING
ASME B16.5 A182 F316L weld neck flanges
4 MARKING
4.1 General Except as modified herein, flanges and flanged fittings shall be marked as required in MSS SP-25, except as noted in para. 4.2.
4.2 Identification Markings
4.2.1 Name. The manufacturer’s name or trademark shall be applied.
4.2.2 Material. Material shall be identified in the following way:
(a) Cast flanges and flanged fittings shall be marked with the ASTM specification,2 grade identification symbol (letters and numbers), and the melt number or melt identification.
(b) Plate flanges, forged flanges, and flanged fittings shall be marked with the ASTM specification number and grade identification symbol.
(c) A manufacturer may supplement these mandatory material indications with his trade designation for the material grade, but confusion of symbols shall be avoided.
(d) For flanges and flanged fittings manufactured from material that meets the requirements of more than one specification or grade of a specification listed in Table 1.1-1, see para. 4.2.8.
(e)Marking of the ASTM specification number or trade designation is the manufacturer’s assurance that the material is in full compliance with that specification or specifications when multiple certifications apply.
4.2.3 Rating Designation. The flange or flanged fitting shall be marked with the number that corresponds to its pressure rating class designation (i.e., 150, 300,400, 600, 900, 1500, or 2500).
4.2.4 Conformance. The designation B16 or B16.5 shall be applied to the flange or flanged fitting, preferably located adjacent to the class designation, to indicate conformance to this Standard. The use of the prefix ASME is optional.
4.2.5 Temperature. Temperature markings are not required on flanges or flanged fittings, however, if marked, the temperature shall be shown with its corresponding tabulated pressure rating for the material.
4.2.6 Size. The NPS designation shall be marked on flanges and flanged fittings. Reducing flanges and reducing flanged fittings shall be marked with the applicable NPS designations as required by paras. 3.2 and 3.3.
4.2.7 Ring Joint Flanges. The edge (periphery) of each ring joint flange shall be marked with the letter R and the corresponding ring groove number.
4.2.8 Multiple Material Marking. Material for components that meet the requirements for more than one specification or grade of a specification listed in Table 1.1-1 may, at the manufacturer’s option, be marked with more than one of the applicable specification or grade symbols. These identification markings shall be placed so as to avoid confusion in identification. The multiple marking shall be in accordance with the guidelines set out in ASME Boiler and Pressure Vessel Code, SectionII, Part D, Appendix 7.
4.2.9 Case Number. When a flange or flanged fitting relies on and meets the requirements of a Case,the Case number shall be included in the markings as “Case##.”
At Haihao Group, we specialize in providing a full range of ASME B16.5 pipe flanges and flanged fittings. Whether you’re looking for weld neck flanges, slip-on flanges, blind flanges, or any other type, we have the expertise and products to meet your specific needs.
If you want to learn more about our product offerings or have any inquiries, please feel free to contact us. We look forward to partnering with you for all your piping needs.
