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HOME QUALITY GUARANTEED Product Inspection

QUALITY GUARANTEED

Product Inspection

Mechanical Property

List
KS Standard Remarks
Tensile Strength (N/㎟) Min 420
Elongation (%) Min 10
Hardness (HB) Max 230

Test Instruments: Universal Material Tester, Brinell Hardness Tester

Hydraulic Test

List
Nominal Dia. Hydraulic Test (Mpa) Remarks
Class 1 Pipe Class 2 Pipe Class 3 Pipe
300mm 이하 7.0 6.0 5.0
350 ~ 600mm 6.0 5.0 4.0
700 ~ 1000mm 5.0 4.0 3.2

Test Instruments: Hydraulic Tester

Pipe Thickness & Weight Tolerance (see attachment)

  • Thickness : -(1.3+0.001 × DN) DN : Nominal pipe diameter, no upper (+) limit
  • Available length : ±30mm
  • Pipe weight : up to 200mm : -8%, 250mm and over : -5%

Test Instruments: Measuring instruments and scale

Paint Test

  • To be normal after 6 hours of soaking in 3% saline solution at room temperature

Mortar Lining Thickness

List
Nominal Pipe Dia. Std. Thickness(㎜) Min. Mean Value(㎜) Min value of 1 point (㎜)
80 ~ 250mm 3 2.5 1.5
300 ~ 600mm 5 4.5 2.5
700 ~ 1000mm 6 5.5 3.0

Mechanical Property

List
KS Standard Remarks
Tensile Strength (N/㎟) Min 420
Elongation (%) Min 10
Hardness (HB) Max 230

Test Instruments: Universal Material Tester, Brinell Hardness Tester

Hydraulic Test

List
Nominal Dia. Hydraulic Test (Mpa) Remarks
Class 1 Pipe Class 2 Pipe Class 3 Pipe
Below 300mm 6.0 5.0 4.0
350 ~ 600mm 5.0 4.0 3.0
700 ~ 1000mm 4.0 3.2 2.0

Test Instruments: Hydraulic Tester

Pipe Thickness & Weight Tolerance (see attachment)

  • Thickness : -(1.3+0.001 × DN) DN : Nominal pipe diameter
  • Available length : ±30mm
  • Pipe weight : up to 200mm : -8%, 250mm and over : -5%

Test Instruments: Measuring instruments and scale

Paint Test

  • To be normal after 6 hours of soaking in 3% saline solution at room temperature

Mortar Lining Thickness

List
Nominal Pipe Dia. Std. Thickness(㎜) Min. Mean Value(㎜) Min value of 1 point (㎜)
80 ~ 250mm 3 2.5 1.5
300 ~ 600mm 5 4.5 2.5
700 ~ 1000mm 6 5.5 3.0

Mechanical Property

리스트
KS Standard Remarks
Tensile Strength (N/㎟) Min 420
Elongation (%) Min 10
Hardness (HB) Max 230

Test Instruments: Universal Material Tester, Brinell Hardness Tester

Hydraulic Test

List
Nominal Diameter Hydraulic Test(Mpa) Remarks
Up to 300mm 6.0
350 ~ 600mm 5.0
700 ~ 1000mm 4.0

Test Instruments: Hydraulic Tester

Pipe Thickness & Weight Tolerance (see attachment)

  • Thickness : -(2.3+0.001 × DN) DN : Nominal pipe diameter, no upper (+) limit

    Flange Weight ± (3+0.05 b) b : Flange Thickness

  • Weight : Shaped (with bent and straight pipes) tube, special type : -12%

    All others : -8%

Test Instruments: Measuring instruments and scale

Paint Test

  • To be normal after 6 hours of soaking in 3% saline solution at room temperature