For test and reports, there are a lots of API 5L symbols in the API 5L specification. This post let’s share the symbols in API 5L SPEC:

API 5L Symbols

a length of strip/plate end weld

Af elongation after fracture, expressed in percent and
rounded to the nearest percent

Agb breadth diameter of guided-bend test mandrel/roll

AI internal cross-sectional area of pipe, expressed in
square millimetres (square inches)

AP cross-sectional area of pipe wall, expressed in square
millimetres (square inches)

AR cross-sectional area of end-sealing ram, expressed in
square millimetres (square inches)

Axc applicable tensile test piece cross-sectional area,
expressed in square millimetres (square inches)

b specified width of bearing face

B distance of the die walls or distance of the supports in
the guided bend text

C constant, which is dependent upon the system of units
used

CEIIW carbon equivalent,
based upon the International Institute of Welding equation

CEPcm carbon equivalent,
based upon the chemical portion of the Ito-Bessyo carbon equivalent equation

d calculated inside diameter of pipe, expressed in
millimetres (inches)

Da manufacturer-designated outside diameter after sizing,
expressed in millimetres (inches)

Db manufacturer-designated outside diameter before sizing,
expressed in millimetres (inches)

D specified outside diameter of pipe, expressed in
millimetres (inches)

f frequency, expressed in Hertz (cycles per second)

KV full-size Charpy V-notch absorbed energy

L length of pipe

NL specified minimum length, coupling dimension

P hydrostatic test pressure, expressed in megapascals
(pounds per square inch)

PR internal pressure on end-sealing ram, expressed in
megapascals (pounds per square inch)

Q specified diameter of
recess coupling dimension

r radius

ra radius of the mandrel for the guided-bend test

rb radius of the die for the guided-bend test

ro pipe outside radius

Rm tensile strength

Rp0,2 yield strength (0,2 % non-proportional extension)

Rt0,5 yield strength (0,5 % total extension)

sr sizing ratio

S hoop stress for the hydrostatic test

t specified wall thickness of pipe, expressed in
millimetres (inches)

tmin minimum permissible wall thickness of pipe, expressed in
millimetres (inches)

U specified minimum tensile strength, expressed in
megapascals (pounds per square inch)

Vt transverse ultrasonic
velocity, expressed in metres per second (feet per second)

W specified outside diameter coupling dimension

strain

wavelength

l mass per unit length
of plain-end pipe

h design hoop stress for
the pipeline

HYSP is pleased to have your enquiries about the API 5L Symbols SPEC or API 5L ERW steel pipes. We are professional ERW carbon welded steel pipe manufacturer in the northern of China. Our erw steel tube can meet all TPI inspection. Welcome to contact us for any request of ERW pipes.

DOWNLOAD: API 5L Symbols