Pre-insulated thermal distribution systems

Insulated Piping Product Centre

Pre-insulated buried pipe systems for district heating, steam, chemical, petroleum and refrigeration networks, with supplied tee and steel-jacket dimensional data.

2 pipe systemsService data up to 350°CPipe & fitting dimensions

The information below is transcribed from the company brochure and supplied workbook. Values marked by the source as standards or limits require project-specific verification before design, certification, specification or tender use.

Pre-insulated piping

Polyurethane Pre-Insulated Direct-Buried Pipe

A factory-prefabricated insulated pipe with a polyurethane insulation layer and either a high-density polyethylene or glass-fibre-reinforced plastic outer casing.

Typical applications

District heatingChemical pipelinesPetroleum systemsRefrigeration networksBuried thermal distribution

Supplied technical data

Item / size	Supplied value
Medium temperature	≤150°C
Working pressure	≤2.5 MPa
Stated service life	30–50 years
Polyurethane foam temperature	143°C continuous; 150°C peak
Polyurethane insulation density	60–80 kg/m³
Polyurethane compressive strength	≥0.3 MPa
HDPE casing density	940–960 kg/m³
HDPE casing tensile strength	≥19 MPa
HDPE casing elongation at break	≥350%
GRP casing density	1800–2000 kg/m³
GRP casing tensile strength	150 MPa
Tee DN 20–200 / branch DN 20–80	Main L1 900 mm; branch L2 crossing/parallel 1000 mm; branch L2 planar 750 mm
Tee DN 20–200 / branch DN 100–200	Main L1 900 mm; branch L2 crossing/parallel 1100 mm; branch L2 planar 750 mm
Tee DN 250–600 / branch DN 20–600	Main L1 1600 mm; branch L2 crossing/parallel 1500 mm; branch L2 planar 900 mm
Tee DN 700 / branch DN 20–500	Main L1 1600 mm; branch L2 crossing/parallel 1500 mm; branch L2 planar 900 mm
Tee DN 700 / branch DN 600	Main L1 1700 mm; branch L2 crossing/parallel 1600 mm; branch L2 planar 900 mm
Tee DN 700 / branch DN 700	Main L1 1700 mm; branch L2 crossing/parallel 1700 mm; branch L2 planar 900 mm
Tee DN 800 / branch DN 50–700	Main L1 1900 mm; branch L2 crossing/parallel 1800 mm; branch L2 planar 900 mm
Tee DN 800 / branch DN 800	Main L1 1900 mm; branch L2 crossing/parallel 1950 mm; branch L2 planar 900 mm
Tee DN 900 / branch DN 50–600	Main L1 2050 mm; branch L2 crossing/parallel 1950 mm; branch L2 planar 1050 mm
Tee DN 900 / branch DN 700–900	Main L1 2050 mm; branch L2 crossing/parallel 2100 mm; branch L2 planar 1050 mm
Tee DN 1000–1200 / branch DN 50–700	Main L1 2050 mm; branch L2 crossing/parallel 2100 mm; branch L2 planar 1050 mm
Tee DN 1000–1200 / branch DN 800–1000	Main L1 2050 mm; branch L2 crossing/parallel 2400 mm; branch L2 planar 1350 mm

High-temperature insulated piping

Steel-Jacketed Steel Pre-Insulated Direct-Buried Pipe

A steel service pipe within a steel outer casing, offered in internal-sliding and external-sliding configurations for steam and other high-temperature media.

Typical applications

Steam networksHigh-temperature mediaIndustrial thermal distributionDirect-buried pipelines

Supplied technical data

Item / size	Supplied value
Configurations	Internal sliding; external sliding
Applicable pressure	≤2.5 MPa
Applicable temperature	Below 350°C
Standards stated in source	CJ/T 200-2004; CJJ 104-2005
57/219	Service pipe 57 × 3.5 mm; casing 219 × 6.0 mm; insulation 60 mm
76/273	Service pipe 76 × 4.0 mm; casing 273 × 6.0 mm; insulation 65 mm
89/273	Service pipe 89 × 4.5 mm; casing 273 × 6.0 mm; insulation 70 mm
108/325	Service pipe 108 × 4.5 mm; casing 325 × 7.0 mm; insulation 70 mm
133/377	Service pipe 133 × 4.5 mm; casing 377 × 7.0 mm; insulation 80 mm
159/377	Service pipe 159 × 6.0 mm; casing 377 × 7.0 mm; insulation 85 mm
219/478	Service pipe 219 × 6.0 mm; casing 478 × 7.0 mm; insulation 100 mm
273/529	Service pipe 273 × 6.0 mm; casing 529 × 7.0 mm; insulation 105 mm
325/630	Service pipe 325 × 7.0 mm; casing 630 × 8.0 mm; insulation 125 mm
377/720	Service pipe 377 × 7.0 mm; casing 720 × 10.0 mm; insulation 140 mm
426/820	Service pipe 426 × 7.0 mm; casing 820 × 10.0 mm; insulation 140 mm
478/820	Service pipe 478 × 7.0 mm; casing 820 × 10.0 mm; insulation 140 mm
529/920	Service pipe 529 × 7.0 mm; casing 920 × 10.0 mm; insulation 165 mm
630/1020	Service pipe 630 × 8.0 mm; casing 1020 × 10.0 mm; insulation 165 mm
720/1220	Service pipe 720 × 10.0 mm; casing 1220 × 12.0 mm; insulation 170 mm
820/1220	Service pipe 820 × 10.0 mm; casing 1220 × 12.0 mm; insulation 170 mm
920/1320	Service pipe 920 × 10.0 mm; casing 1320 × 14.0 mm; insulation 170 mm
1020/1420	Service pipe 1020 × 10.0 mm; casing 1420 × 14.0 mm; insulation 170 mm

Source: Shaanxi Yongfeng Industrial Co., Ltd. product brochure and the supplied product image/parameter workbook.

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