SUBSECTION B

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(g) For radiographic and ultrasonic examination of butt welds, the definition of nominal thickness at the welded joint under consideration shall be the nominal thickness of the thinner of the two parts joined. Nominal thickness is defined in 3-2. Fion Zhang/ Charlie Chong UW-11
http://www.mechanicalengine eringblog.com/3635-weldingtechnology-electro-gaswelding-egw/ Fion Zhang/ Charlie Chong UW-11
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SUBSECTION B REQUIREMENTS PERTAININ
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PART UW Overview Fion Zhang/ Charli
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Type number Joint description Limit
Page 7 and 8: UW-2 SERVICE RESTRICTIONS. Fion Zha
Page 9 and 10: UW-2 SERVICE RESTRICTIONS Class a b
Page 11 and 12: UW-2 Class a Description. Vessels a
Page 13 and 14: WELDED JOINT CATEGORY ASME VIII pre
Page 15 and 16: • Cat “A” includes all longit
Page 17 and 18: Non-hemispherical head Critical Cir
Page 19 and 20: • Cat B includes most circumferen
Page 21 and 22: • Cat D includes welded joints co
Page 23 and 24: The main content relates to two are
Page 25 and 26: (d) Except when the longitudinal jo
Page 27 and 28: staggered or separated by a distanc
Page 29 and 30: Based on the ASME Code requirement
Page 31 and 32: Fion Zhang/ Charlie Chong UW-11
Page 33 and 34: Item 3: All butt welds in an unfire
Page 35 and 36: RT Item Note Joint Efficiency (Type
Page 37 and 38: UCS-57 RADIOGRAPHIC EXAMINATION In
Page 39 and 40: UW-11(a2) all butt welds in vessels
Page 41 and 42: UW-11 RADIOGRAPHIC AND ULTRASONIC E
Page 43 and 44: UW-11(a) Full Radiography (1) all b
Page 45 and 46: Except as required by UHT-57(a), Ca
Page 47 and 48: Any vessel with welded joint exceed
Page 49 and 50: in which case: (a)Category A and B
Page 51 and 52: (7) ultrasonic examination in accor
Page 53 and 54: Full Radiography means UW-11 (a-5):
Page 55 and 56: Radiographic examination is not req
Page 57: UW-11(d,e,f) Special welding proces
Page 63 and 64: UW-12 JOINT EFFICIENCIES Fion Zhang
Page 65 and 66: Summary of weld types: Type 1: Full
Page 67 and 68: Type number Joint description Limit
Page 71 and 72: Summary Maximum Weld Joint Efficien
Page 73 and 74: Butt joints as attained by double-w
Page 75 and 76: TABLE UW-12 MAXIMUM ALLOWABLE JOINT
Page 77 and 78: Weld type number 1: Single “V”
Page 85 and 86: GENERAL NOTES: (a) The single facto
Page 87 and 88: UW12(d) Seamless vessel sections or
Page 89 and 90: UW12(d) • all Category A welds ar
Page 91 and 92: Q. Given a seamless head or shell s
Page 93 and 94: Hemispherical head • 100% RT UW-5
Page 103 and 104: FIG. UW-16.1 SOME ACCEPTABLE TYPES
Page 105 and 106: t c = not less than the smaller of
Page 107 and 108: Exercise: Problem: A nozzle is bein
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FIG. UW-16.1 SOME ACCEPTABLE TYPES
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Fion Zhang/ Charlie Chong UW-16
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Fion Zhang/ Charlie Chong UW-16
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• t = nominal thickness of vessel
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where it meets a set-on nozzle, by
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Q3. ASME VIII section UW-16 (c) fig
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Q5. ASME VIII section UW-16 (d)(1)
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UW-40(f ) The term nominal thicknes
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UW-40(a), the soak band shall conta
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fillet welds, the nominal thickness
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The nominal thickness 6. When a wel
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Mr. “t” the nominal thickness (
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Mr. “t” the nominal thickness e
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UW-50 NONDESTRUCTIVE EXAMINATION OF
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UW-51 RADIOGRAPHIC EXAMINATION OF W
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10-13 RECORDS RETENTION a) The Manu
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(c) For manufacturers of UM stamped
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When do you need full RT Fion Zhang
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UW-11, a(2). All materials; welded
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UW-11 (a3) all butt welds in the sh
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UW-11 (a6) all butt welds joined by
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UW-51 (a2) A written radiographic e
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Demonstration of (1) density and (2
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Demonstration of (1) density and (2
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• Repaired welding, at the option
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Unacceptable imperfections UW-51 (b
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UW-51 (b3) any group of aligned ind
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UW-51 (b2) http://www.ndted.org/Edu
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In-progress RT for quality improvem
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This rule also addresses smaller, o
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UW-52 (b2) For each increment of we
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Welder-C Welder-B Welder-A Under co
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UW-52 (b3) Each spot examination sh
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UW-52 (b4) Radiographs required at
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UW-52 (b4) Radiographs required at
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UW-52 (c) Standards for Spot Radiog
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Spot radiographs may be retained or
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UW-51 (b2) t = the thickness of the
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UW-52(d) Evaluation and Retests UW-
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UW-52(d) Evaluation and Retests (1)
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Fion Zhang/ Charlie Chong
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SUBSECTION B

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