2.3.1
Pipe
ASTM A 53/A 53M, Type E (electric-resistance welded, Grades A or B) or Type
S (seamless, Grade A or B), black steel; Weight Class STD (Standard) for
pipe sizes larger than 50 mm 2 inches, Weight Class XS (Extra-Strong) for
pipe sizes 50 mm 2 inches and smaller.
2.3.2
Line Pipe
API Spec 5L, seamless, submerged-arc weld or gas metal-arc weld; Grade B,
black steel, Weight Class STD (Standard) for pipe sizes larger than 50 mm 2
inches, Weight Class XS (Extra-Strong) for pipe sizes 50 mm 2 inches and
smaller.
2.4
FITTINGS FOR CARBON STEEL PIPING
2.4.1
Threaded Fittings and Socket Welding Fittings
ASME B16.11.
Threaded fittings may conform to ASME B16.3, Class 150.
2.4.2
Buttwelding Fittings and Tapered Reducing Fittings
ASME B16.9, ASTM A 234/A 234M, Type WPB, of the same material and weight as
the piping in which fittings are installed. Backing rings shall conform to
ASME B31.3 and be compatible with materials being welded.
2.4.3
Flanges
ASME B16.5, Class 150, Raised Face Type, ASTM A 105/A 105M.
2.4.4
Unions
ASME B16.39, Class 150.
2.5
WELDING FOR CARBON STEEL PIPING
2.5.1
Process for Carbon Steel
ASME B31.3, metallic arc process. [Ten percent of welds shall be examined
by radiography; if 25 percent of the radiographed welds fail, 100 percent
of welds shall be examined by radiography.]
2.5.2
Welding Electrodes
AWS A5.1 or AWS A5.5, E70XX low hydrogen electrodes.
2.6
STAINLESS STEEL PIPING
**************************************************************************
NOTE: Indicate on drawings the piping materials
permitted for each piping system (i.e., carbon steel
piping, stainless steel piping, aluminum piping).
**************************************************************************
ASTM A 312/A 312M, Grade 304L, Schedule 10 minimum wall thickness for pipe
sizes larger than 50 mm 2 inches; Schedule 40 for pipe sizes 50 mm 2 inches
and smaller. The entire length of weld in each longitudinal welded pipe
shall be radiographically examined in accordance with ASTM A 312/A 312M, S5
Radiographic Examination.
SECTION 15194N
Page 15
Previous Page
