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What is seamless steel pipe

Date:2021-01-25

seamless pipes are produced starting from steel billets, that are heated and perforated to create the tubular section. the word “seamless” means the absence of seam welds.

seamless steel pipes are used for different applications within the oil & gas industry:

upstream operations (octg pipes)

midstream (transmission and distribution of fluids, as oil, gas, steam, acids, slurries)

downstream (process piping to refine oil and gas in derivative products)

general plumbing applications for utility services

the most common types of pipes used in the oil&gas industry are (astm pipe specifications):

api spec 5l/5ct

product name

executive standard

dimension (mm)

steel code/ steel grade

casting

api 5ct

114-219 x 5.2-22.2

j55, k55, n80, l80, p110

tubing

api 5ct

48.3-114.3 x 3.2-16

j55, k55, n80, l80, h40

casting

api 5l

10.3-1200 x 1.0-120

a, b, x42, x46, x52, psl1 / psl2

astm/asme

product name

executive standard

dimension (mm)

steel code/ steel grade

black and hot-dipped zinc-coated steel pipes seamless

astm a53

0.3-1200 x 1.0-150

gr.a, gr.b, gr.c

seamless carbon steel for high temperature service

astm a106

10.3-1200 x 1.0-150

gr.b, gr.c

seamless cold-drawn low-carbon steel heat-exchanger and condenser tubes

astm a179

10.3-426 x 1.0-36

low carbon steel

seamless carbon steel boiler tubes for high pressure

astm a192

10.3-426 x 1.0-36

low carbon steel

seamless cold-drawn intermediate alloy steel heat-exchanger and condenser tubes

astm a199

10.3-426 x 1.0-36

t5, t22

seamless medium-carbon steel boiler and superheater tubes

astm a210

10.3-426 x 1.0-36

a1, c

seamless ferritic and austenitic alloy steel boiler, superheater and heat-exchanger tubes

astm a213

10.3-426 x 1.0-36

t5, t5b, t9 , t11, t22 ,t91

seamless carbon and alloy steel for mechanical tubing

astm a333

1/4″-42″ x sch20-xxs

grade 1, gr.3,gr.6, gr.8 , gr.9

seamless cold-drawn carbon steel feedwater heater tubes

astm a556

10.3-426 x 1.0-36

a2, b2

for seamless ferritic alloy-steel pipe for high-temperature service

astm a335

1/4″-42″ x sch20-xxs

p5, p9 ,p11, p91, p22, p92

din/en

product name

executive standard

dimension (mm)

steel code/ steel grade

seamless steel tubes for elevated temperature

din 17175

10-762 x 1.0-120

st35.8,st45.8, 10crmo910, 15mo3, 13crmo44, stpl340, stb410, stb510, wb36

seamless circular tubes of non alloys steels with special quality requirements.

din 1629

13.5-762 x 1.8-120

st37.0, st44.0, st52.0

seamless steel tubes for pressure purposes

en 10216

4.0-60.0 x 0.5-8

p235gh tc1, p235gh tc2, 16mo3

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