The standards committee that approved the code or standard was balanced to ensure that individuals from competent and concerned interests had the opportunity to participate. The proposed code or standard has been made available for public review and comment, providing an opportunity for additional public input from industry, academia, regulatory agencies, and the general public. The 2012 edition added Tables A-1M and A-2M to Appendix A, giving allowable design values in SI units, and added Appendix N, International Use of ASME B31.3.
ASME B31 COMMITTEE Code for Pressure Piping
INTRODUCTION
Further information or active participation on the part of the proposer may be requested during consideration of a proposed revision. Materials are usually listed in stress tables only when sufficient use has been shown in piping within the scope of the Code.
ASME B31.3-2018 SUMMARY OF CHANGES
For titanium and titanium alloys, product shape and grade/condition/tempering are added and stress values are revised. For titanium and titanium alloy materials, product form and grade/condition/tempering are added; and mine.
Scope and Definitions
The filler metal is distributed between closely bonded joint surfaces by capillary attraction. The filler metal is distributed between closely bonded joint surfaces by capillary attraction.
DesignDesign
SYSTEMS
The design pressure and temperature for instrument piping shall be determined in accordance with para. If it will be necessary to inflate (or bleed) instrument tubing containing toxic or flammable liquids, safe disposal must be considered. A full face stop valve may be installed on the inlet side of a pressure relief device.
As an alternative to (b) above, shut-off valves are designed and installed so that they can be locked or sealed in the open or closed position. When released directly into the atmosphere, the release must not interfere with other pipes or equipment and must be directed away from platforms and other areas used by personnel. Reactions on the piping system due to the actuation of safety relief devices must be considered and adequate strength must be provided to withstand these reactions. a) Pressure relief devices required by para.
The terms design pressure11 and piping system shall be substituted for maximum allowable working pressure and vessel, respectively, in these paragraphs.
MaterialsMaterials
Column B Design Minimum Temperature Colder Than Minimum Temperature in Table A-1, Table A-1M, or Figure 323.2.2Aor as described in Para. 323.2.2(b) is greater than 0.3, the design minimum temperature shall not be colder than the lower of −48°C (−55°F) or the minimum temperature for the material in Table A-1 or Table A-1M not. 5) Impact tests are not required when the maximum obtainable Charpy specimen has a width along the notch of less than 2.5 mm (0.098 in). 323.3.1 General. When impact testing is required by Table 323.2.2, provisions elsewhere in this Code, or the engineering design, it shall be conducted in accordance with Table 323.3.1 using the test methods and acceptance criteria described in paras.
When the maximum possible test specimen has a width along the notch of less than 8 mm, the test shall be conducted at a temperature lower than the minimum design temperature by the amount shown in Table 323.3.4 for that specimen width. When the largest possible test specimen has a width along the notch less than 80% of the material thickness, the test shall be conducted at a temperature lower than the minimum design temperature by an amount equal to the difference (see Table 323.3.4). ) between the temperature drop corresponding to the actual material thickness and the temperature drop corresponding to the actual tested width of the Charpy specimen. a) Minimum energy requirements. 323.4.3 Cladding and cladding materials. Metal-clad or metal-clad materials may be used subject to the following provisions:.
323.1 and provided the clad plate has been shear tested and meets all shear test requirements of the applicable ASTM specification.
Standards for Piping Components
MSS SP-25, Class 150 (PN 20), corrosion resistant gate, globe, angle and check valves with flanges and weld ends. MSS SP-42 Stainless Steel Butt Weld Forged Fittings Including Reference to Other Corrosion Resistant Materials [Note (4)] MSS SP-43. MSS SP-51 High pressure chemical industry flanges and threaded fittings for use with lens seals.
In accordance with MSS SP-43, the pressure ratings for Class CR fittings are 30% of those calculated for straight seamless pipe of minimum wall thickness.). Only MP class fittings are considered a "listed component" for the purposes of this code. Warning: See MSS SP-119 (Section 5) for special provisions regarding classifications. In accordance with MSS SP-119, pressure values for MP class fittings are 87.5% of those calculated for straight seamless pipe of minimum wall thickness.).
(6) See also Appendix A. 7) ASME PTC 19.3 TW allows mechanical design of thermowells to conform to various design codes.
Fabrication, Assembly, and Erection
The root opening of the joint must be within the tolerances in the WPS. a) Welds, including the addition of weld metal for alignment [para. The welds must be completed with fillet welds with a throat dimension not less than tc. e). For welds requiring PWHT in accordance with Table 331.1.1, the material temperature during PWHT shall be within the specified range.
The width of the band heated to the specified temperature range must be a minimum of three times the wall thickness at the weld of the thickest part being joined. The thickness after bending or forming should not be less than required by the design. Unless otherwise specified in the engineering design, flange connections shall be aligned as described in (1) or (2), and (3).
The sealing surface of the flare shall be examined for imperfections prior to assembly and any flare with imperfections shall be rejected.
Inspection, Examination, and Testing
Pipe and piping elements for Category D fluid service as designated in the engineering design shall be visually examined in accordance with para. Any investigation shall be carried out in accordance with a written procedure that complies with one of the methods specified in par. Magnetic particle examination of welds and of components other than castings shall be performed in accordance with ASME BPVC, Section V, Article 7.
Liquid penetrant examination of welds and of components other than castings shall be performed in accordance with ASME BPVC, Section V, Section 6. Radiography of welds and of components other than castings shall be performed in accordance with ASME BPVC, Section V, Section 2. 345.3.3(c), a piping system containing unrestricted expansion joints shall be leak tested without any temporary restrictions in accordance with par.
345 exceeds the pressure of the test performed by the manufacturer in accordance with Appendix
Nonmetallic Piping and Piping Lined With Nonmetals
MATERIALS
A328.2.1(a), shall be performed to qualify each BPS and the performance of each bonder and bonding operator. A fabricated branch connection must be made by inserting the branch pipe into the hole in the running pipe. A328.5.6 Adhesive joints in RTR and RPM pipes (a) Procedure.Joints shall be made in accordance with the qualified BPS.
The hole in the barrel must be made with a hole saw; the cut Figure A328.5.3 Thermoplastic Solvent Cemented Joint. The composition of flexible elastomeric sealed joints must be in accordance with the manufacturer's recommendations and the following:. Not less than 5% of all bonded joints must be examined by a process in accordance with para.
A345.5 must be met, and the pressure in the liquid-filled part of the pipeline must not exceed the values calculated in accordance with the paragraph.
Piping for Category M Fluid Service
THROUGH 20, CORRESPONDING TO CHAPTER VIICHAPTER VII
Paragraphs MA300 to MA346 apply to non-metallic and non-metallic-lined pipelines under Chapter VII. Paragraph A300(d) applies. MA302.2.4 Allowances for pressure and temperature fluctuations. Paragraph A302.2.4(a) applies to both nonmetallic pipe and nonmetallic-lined metal pipe. Non-metallic branch connections must not be used. MA307 VALVES AND SPECIAL COMPONENTS Paragraph A307 applies except that non-metallic valves and special components are not used.
Threaded connections should not be used. MA315 PIPE CONNECTIONS IN NON-METALLIC PIPES Paragraph A315 applies in its entirety. Paragraph A326 applies in its entirety. Table A326.1 applies, except for components and systems prohibited or restricted elsewhere in this Chapter. MA344 TYPES OF EXAMINATION Paragraph A344 applies in its entirety. a) a sensitive leak test in accordance with paragraph
High Pressure Piping
The required wall thickness of straight pipe sections is determined according to eq. K304.1.3 Straight pipe under external pressure. The design pressure thickness for a straight pipe under external pressure is determined in accordance with para. K303 or (b) or (c) below qualifies as required by para. b) The blind flange can be designed in accordance with en.
K322.3.2 Requirements. Instrument pipe within the scope of this Chapter must be in accordance with par. Instruments and control pipes not within the scope of this Chapter shall be designed in accordance with para. However, the upper temperature limit must be less than the temperature for which an allowable stress is determined in accordance with par.
The allowable stress used must be that for the base metal at the design temperature.
High Purity Piping
Furthermore, when weld coupon examination is specified in the engineering design or in the reference code or standard (eg ASME BPE or SEMI), primary weld coupons must be made in accordance with para. U335.7.1 Metal face seal. Metal face seal joints must be installed and assembled in accordance with the manufacturer's instructions. U335.7.2 Nonmetallic Face Seal Nonmetallic seal joints shall be installed and assembled in accordance with manufacturer's instructions.
Hygienic clamp assembly components, e.g. those shown in Figures U335.8A, U335.8B, and U335.8C, shall be installed and assembled in accordance with the manufacturer's instructions. The test shall be one of the following methods and shall be carried out in accordance with the following:. For pressurized systems, the test shall be in accordance with ASME BPVC, Section V, Article 10, Appendix IV (Helium Mass Spectrometer — Detector Probe Technique).
For evacuated systems, the test must be in accordance with ASME BPVC, Section V, Article 10, Appendix V (Helium Mass Spectrometer Test — Tracer Probe Technique).
APPENDIX A
ALLOWABLE STRESSES AND QUALITY FACTORS FOR METALLIC PIPING AND BOLTING MATERIALS
1) *The stress values in Tables A-1 and A-1M and the design stress values in Tables A-2 and A-2M are the basic allowable stresses in tension in accordance with paragraph. For design pressure, the stress values from Tables A-1 and A-1M are multiplied by the appropriate quality factor E (Ec from Table A-1A or Ejn from Table A-1B). If a higher strength base material is used, higher stress values for that material can be used in design.
If the material is welded, soldered or soldered, the allowable stress values for the annealed condition shall be used. 35). *The stress values for this material are not applicable when either welding or thermal cutting is used [see para. If welding is not used in the manufacture of pipes from these materials, the stress values can be increased to 230 MPa (33.3 ksi).
The stress values apply to either unexpanded or cold-expanded material in the as-rolled, normalized, or normalized and tempered condition.
