Product Technical Specifications: Nylon & Composite Pipes

Specification

Parameters & Requirements

Nominal Diameter (DN)

50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000 mm

Nominal Pressure (PN)

1.0 MPa, 1.6 MPa, 2.5 MPa

Operating Temperature

-36℃ to 150℃

Standard Length

150, 200, 250, 300, 400, 500, 600, 750, 1000, 2000, 3000, 6000 mm

Wall Thickness

Average Wall Thickness ≥ Design Value; Minimum Wall Thickness ≥ 90% of Design Value

Bending Strength

≥ 30 MPa

Longitudinal Reversion

< 3%

Burst Pressure

≥ 3 times Nominal Pressure

Hydrostatic Test

1.5 times Nominal Pressure, pressure maintained for 10 min (No leakage or rupture)

Pressure Cracking Stability

At 30% deformation, no cracks on inner or outer surfaces

Acid & Alkali Resistance

Acid Resistance: Weight gain ≤ 0.45% (Soaked in 10% H₂SO₄ for 10 days)

Alkali Resistance: Weight loss ≥ 0.25% (Soaked in 40% NaOH for 10 days)

Connection Method

Flange Connection, Hot-melt Welding

Appearance Standard

Milky white / slightly yellow; smooth inner and outer surfaces, free from bubbles, scratches, or dents

Applicable Media

Petroleum, natural gas, crude oil, sewage, seawater, acid/alkali/salt solutions, chemical fluids, mud, slurry, and other neutral / weakly corrosive liquids

Typical Applications

Oil and gas gathering/transportation, chemical industry, metallurgy, mining, power generation, water treatment, municipal water supply and drainage

Specification

Parameters & Requirements

Nominal Diameter (DN)

100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1400, 1600, 1800, 2000 mm

Nominal Pressure (PN)

1.0 MPa, 1.6 MPa, 2.5 MPa

Operating Temperature

-36℃ to +160℃

Standard Length

Up to 6000 mm (Customizable lengths available upon request)

Wall Thickness

Average Wall Thickness ≥ Design Value; Minimum Wall Thickness ≥ 90% of Design Value

Mechanical Strength

Yield Strength: ≥ 306 MPa

Tensile Strength: ≥ 447 MPa

Burst Pressure

≥ 3 times Nominal Pressure

Hydrostatic Test

1.5 times Nominal Pressure, pressure maintained for 10 min (No leakage or rupture)

Pressure Cracking Stability

No surface cracks under pressure

Acid & Alkali Resistance

Acid Resistance: Weight gain ≤ 0.45% (Soaked in 10% H₂SO₄ for 10 days)

Alkali Resistance: Weight loss ≥ 0.25% (Soaked in 40% NaOH for 10 days)

Base Steel Pipe Material

GB/T 8163 Seamless Pipe, SY/T 5037 Spiral Welded Pipe, GB/T 13793 Longitudinal Welded Pipe

Connection & Flanges

Connection: Flange Connection

Flange Standards: GB/T 9119, HG 20592-RF, ASME B16.5 Class150

Applicable Media

High-temperature oil and gas, crude oil, sewage, acids, alkalis, brine, sulfur-containing media, highly corrosive chemical liquids

Typical Applications

High-temperature/high-pressure oil & gas transmission, highly corrosive environments, oilfield water injection, main gathering pipelines, chemical piping networks