ASME BPVC-III NB ADD:2008 pdf free download

ASME BPVC-III NB ADD:2008 pdf free download.Division 1 – Subsection NB Class 1 Components.
(3) All other welding material shall be analyzed for the elements specified in either the welding material specification rcfcrenced by the WPS or in thc WPS.
(b) The che,nical composition of the weld metal or tiller iueal shall conform to the welding material specification for elements having specified percentage composition limits. Where the Welding Procedure Specification contains a modification of the composition limits of SFA or other referenced welding material specifications, or provides limits for additional elements, these composition limits of the welding procedure specification shall apply for acceptability.
(c) The results of the chemical analysis shall be reported in accordance with NCA-3853.5. Elements listed in Table NB-2432.2(a)-l or Table NB-2432.2(a)-2 hut not specified in the welding material specification or WPS shall be reported for information only.
NB-2433 Delta Ferrite l)cterniinatinn
A determination of delta ferrite shall be perfonned on A-No. 8 weld material (Section IX, QW-44) hacking filler metal (consumable inserts); bare electrode, rod, or wire filler metal: or weld metal, except that delta ferrite determinations are not required for SFA-5.9 and SFA-5.4. Type 16-8-2, or A-No. 8 weld filler metal to be used for weld metal cladding.
NB-2433.l Nlethod. Delia ferrite determinations of welding material, including consumable insert material, shall be made using a magnetic measuring instrument and weld deposits made in accordance with (b) below. Alternalively, the delta ferrite determinations for welding materials may be performed by the use of chemical analysis of NB-2432 in conjunction with Fig. NH-2433.l-l.
(a) Calibration of magnetic instruments shall conform to AWS-A4.2.
(b) The weld deposit for magnetic delta ferrite determination shall be made in accordance with NB-2432.l(c).
(c) A minimum of six krrite readings shall be taken on the surface of the weld deposit. The readings obtained shall be averaged to a single Ferrite Number (FN).
N 11-2433.2 Acceptance Standards. The nliflimUm acceptable delta ferrite shall be 5FN. The results of the delta ferrite determination shall be included in the Certified Material Test Report of NH-2 130 or NB-4 120.
NB-2440 STORA(;F AND IIANI)1INC OF WEIJ)ING MATERIAL
Suitable storage and handling of electnxles. flux, and other welding material shall be maintained, Precautions shall be taken to minimize absorption of moisture by fluxes and cored, fabricated, and coated electrodes.
NH.2500 EXAMINATION AND REPAIR OF PRESSURE-RETAINING
MA’l’FRIAL
NK-2510 EXAMINATION OF PRESSURE- RETAINING MATERIAl,
(a) Pressure-retaining material and material welded thereto shall be examined by nondesirnefive methods applicable to the material and product ftrm as required by the rules of this Suharticle. except for pumps and valves with inlet piping connections NPS 2 (DN 50) and less. Seamless pipe. tubes, and fittings. NPS I DN 25) and less, need not be examined by the rules of this Suharticle. The NPS I (DN 25) size exemption does not apply to heat exchanger tubing.
(b) For forged and cast pumps and valves with inlet piping connections over NPS 2 (DN 50). up to and including NPS 4 (DN 1(X)). magnetic particle or liquid penetrant examinations may be performed in lieu of volumetric examination, except that the welding ends for cast pumps and valves shall be radiographcd for a minimum distance of’ I (when t is the design section thickness 01 the weld) from the final welding end.
(C) The requirements of this Subarticle for repair by welding, including examination of the repair welds, shall be met wherever repair welds are made to pressure-retaining material and material welded thereto, The exceptions in (a) and (b) above do not apply to repair welds.
NB-2520 EXAMINATION AFIER QUENCHING AND TEMPERING
Ferritic steel products that hac their pwpcrties enhanced by quenching and tempering shall be examined by the methods specified in this Suharticle for each product form after the quenching and tempering phase of the heat treatment.
NB-2530 EXAMINATION AND REPAIR OF PLATE
NB-2531 Required Examination
All plates 2 in. (50 mm) nominal thickness arid less used for piping. pumps.