Spiral Steel Pipe Standard

Standardization

SY/T5037-2000

GB/T9711.1-1997(A Grade)

API Spec 5L(A Grade)

The fuel gas, water, the coal gas, air, heating, vapor and other ordinary fluid conduit uses steel pipe

The petroleum＆gas industry transport uses steel pipe

The petroleum＆gas industry transportation uses steel pipe

Type

Q195、Q215、Q235

L175——L483

A、B、X42～X70

Size

Out

Diameter

D＜508  ±0.75%D

D≥508  ±1.00%D

D＜508  ±0.75%D

D≥508  ±1.00%D

D＜508  ±0.75%D

508≤D≤914  -0.25%D～+0.75%D

D＞914   -3.20～+6.35

Jet

Out

Diameter

D＜508  ±0.75%D or ±2.5  (Minimum) D≥508  +0.50%D  or ±4.5  (Minimum)

D≤273.1   -0.40～+1.59

D＞323.9   -0.79～+2.38

D≤273.1...   -0.40～+1.59

D＞273.1...   -0.79～+2.38

Deviation

Wall Thickness

<508

±12.5%t

-12.5%t～+15.0%t

-12.5%t～+15.0%t

≥508

±10.0%t

L175～L245  -10.0%t～+17.5%t

≤B Grade -12.5%t～+17.5%t

L290～L555  -8.0%t～+19.5%t

≥X42 -8.0%t ～+19.5%t

Ellipticity

Within 100mm of Jet Out ±1%D

Within the Jet scope of 101.6 which its D＞508,the maximum OD≤1%D of the gauge and the minimum OD≥1%D of the  gauge

Within the Jet scope of 101.6 which its D＞

508,the maximum OD≤1%D of the gauge and the minimum OD≥1%D of the  gauge

Bending

≤0.2% of the total length

≤0.2% of the total

length

≤0.2% of the total

length

Jet bevel

Bevel angle 30°--35°     Shoulder 1.6±0.8

Bevel angle 30°--35°  Shoulder 1.59±0.79

Bevel angle 30°--35°  Shoulder 1.59±0.79

Cuts slanting

D＜813 , ≤1.6

D≥813 , ≤3.0

＜1.59

＜1.59

Inlaying

t≤12.7

0.35t and ≤3.0

≤1.59

≤1.59

t＞12.7

0.25t

Minimum between 0.1251 and 3.18

Minimum between 0.1251 and 3.18

Welded joint surplus height

T≤13…＜3.2

t＞13  ＜4.8

T≤12.7…＜3.18

t＞12.7  ＜4.76

T≤12.7…＜3.18

t＞12.7  ＜4.76

Chemical analysis

Select a sample from each batch

Select two samples from each batch

Select two samples from each batch

Stretch testing sample

Select a welded joint from each testing lots

Material: Select a sample from each batch

Spiral welded joint: Select a sample from each batch

Butt-welded joint: select a sample within 50

Material: Select a sample from each batch

Spiral welded joint: Select a sample from each testing lots Butt-welded joint: select a sample within 50

Oriented bend testing

Not available

Select a front-side bending sample and a reverse-side bending sample from each testing lots

Select a front-side bending sample and a reverse-side bending sample within 50 Butt-welded joints

Select a front-side bending sample and a reverse-side bending sample from each testing lots

Select a front-side bending sample and a reverse -side bending sample within 50 Butt-welded joints

Break toughness testing

Not available

Per the contracts, select

3 charpy impacts from each batch

When D≥508, select 2 drop hammer impacts from each batch