ASME B31.3 EXAM (ACTUAL 2025/2026) QUESTIONS AND
VERIFIED ANSWERS ALREADY PASSED
What size cover fillet weld (tc) is required around the fully
penetrated groove weld of the branch into the header? -
AnswersAnswersAnswerslesser of .7 x thickness of the
branch or 1/4"
A weld defect to be repaired shall be removed: -
AnswersAnswersAnswersTo sound metal
What table can you find the preheat temperature. -
AnswersAnswersAnswersASME B31.3 table 330.1.1
A NPS 8 s40 pipe ASTM grade B is to be welded. The weather
is clear. The temperature is 30 degrees F. What preheat
temperature, if any, is required. - AnswersAnswersAnswers50
degrees F
The zone of preheat shall extend: -
AnswersAnswersAnswersAt least 1" beyond the edge of the
weld.
When deciding what preheat temperature to use what are the
two factors? - AnswersAnswersAnswersP no. Of pipe found in
table A1 and thickness of pipe.
,When welding two dissimilar materials, how do you determine
the preheat temperature? - AnswersAnswersAnswersYou
always use the higher of the two required temperatures.
An ASTM A106 grade B, NPS 8, s40 pipe is to be welded to an
ASTM A335 grade P9, NPS 8, s40 pipe. What preheat
temperature is required? - AnswersAnswersAnswers350
degrees F
When components of a piping system are joined by welding,
the thickness to be used in applying the heat treatment
provisions of ASME B31.3, Table 331.1.1 shall be: -
AnswersAnswersAnswersThat of the thicker component
measured at the joint, except for certain exclusions.
Where a hardness limit is specified in table 331.1.1, at least
____% of welds! hot bends, and hot formed components in each
heat treated batch and 100% of those locally heat treated shall
be tested. - AnswersAnswersAnswers10
When welding two different p no. Pipes together and what is
required, what determines your hardness from table 331.1.1? -
AnswersAnswersAnswersEach P no. Pipe will have its own
hardness requirement.
What is acceptable as an alternative heat treatment? -
AnswersAnswersAnswersNormalizing, normalizing and
tempering, or annealing
, When entire piping assembly to be heat treated cannot fit into
the furnace, it is permissible to heat treat in more than one
heat, provided there is at least ____ overlap between
successive heats! and that parts of the assembly outside of the
furnace are protected from harmful temperature gradients. -
AnswersAnswersAnswers1 foot
Flattening of a bend, the difference between maximum and
minimum diameters at any cross section, shall not exceed
___% on nominal outside diameter for internal pressure. -
AnswersAnswersAnswers8 (removal of metal shall not be
used to achieve these requirements)
Flattening of a bend, the difference between maximum and
minimum diameters at any cross section, shall not exceed
___% on nominal outside diameter for external pressure. -
AnswersAnswersAnswers3% (removal of metal is prohibited)
While assembling a piping system it is required to pull two
pieces into alignment. This distorts one of the pieces (puts a
bend into one of the pipe sections). The assembly is in a strain
that the inspector feels is detrimental to the equipment. What
action should the inspector take? -
AnswersAnswersAnswersSince any distortion that introduces
a strain is prohibited, the detail should be removed and the
problem corrected.
Before bolting up flanges, the inspector should check
alignment to the design plane. It should be within ____.
Measured across diameter. - AnswersAnswersAnswers1/16"
VERIFIED ANSWERS ALREADY PASSED
What size cover fillet weld (tc) is required around the fully
penetrated groove weld of the branch into the header? -
AnswersAnswersAnswerslesser of .7 x thickness of the
branch or 1/4"
A weld defect to be repaired shall be removed: -
AnswersAnswersAnswersTo sound metal
What table can you find the preheat temperature. -
AnswersAnswersAnswersASME B31.3 table 330.1.1
A NPS 8 s40 pipe ASTM grade B is to be welded. The weather
is clear. The temperature is 30 degrees F. What preheat
temperature, if any, is required. - AnswersAnswersAnswers50
degrees F
The zone of preheat shall extend: -
AnswersAnswersAnswersAt least 1" beyond the edge of the
weld.
When deciding what preheat temperature to use what are the
two factors? - AnswersAnswersAnswersP no. Of pipe found in
table A1 and thickness of pipe.
,When welding two dissimilar materials, how do you determine
the preheat temperature? - AnswersAnswersAnswersYou
always use the higher of the two required temperatures.
An ASTM A106 grade B, NPS 8, s40 pipe is to be welded to an
ASTM A335 grade P9, NPS 8, s40 pipe. What preheat
temperature is required? - AnswersAnswersAnswers350
degrees F
When components of a piping system are joined by welding,
the thickness to be used in applying the heat treatment
provisions of ASME B31.3, Table 331.1.1 shall be: -
AnswersAnswersAnswersThat of the thicker component
measured at the joint, except for certain exclusions.
Where a hardness limit is specified in table 331.1.1, at least
____% of welds! hot bends, and hot formed components in each
heat treated batch and 100% of those locally heat treated shall
be tested. - AnswersAnswersAnswers10
When welding two different p no. Pipes together and what is
required, what determines your hardness from table 331.1.1? -
AnswersAnswersAnswersEach P no. Pipe will have its own
hardness requirement.
What is acceptable as an alternative heat treatment? -
AnswersAnswersAnswersNormalizing, normalizing and
tempering, or annealing
, When entire piping assembly to be heat treated cannot fit into
the furnace, it is permissible to heat treat in more than one
heat, provided there is at least ____ overlap between
successive heats! and that parts of the assembly outside of the
furnace are protected from harmful temperature gradients. -
AnswersAnswersAnswers1 foot
Flattening of a bend, the difference between maximum and
minimum diameters at any cross section, shall not exceed
___% on nominal outside diameter for internal pressure. -
AnswersAnswersAnswers8 (removal of metal shall not be
used to achieve these requirements)
Flattening of a bend, the difference between maximum and
minimum diameters at any cross section, shall not exceed
___% on nominal outside diameter for external pressure. -
AnswersAnswersAnswers3% (removal of metal is prohibited)
While assembling a piping system it is required to pull two
pieces into alignment. This distorts one of the pieces (puts a
bend into one of the pipe sections). The assembly is in a strain
that the inspector feels is detrimental to the equipment. What
action should the inspector take? -
AnswersAnswersAnswersSince any distortion that introduces
a strain is prohibited, the detail should be removed and the
problem corrected.
Before bolting up flanges, the inspector should check
alignment to the design plane. It should be within ____.
Measured across diameter. - AnswersAnswersAnswers1/16"
