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Plumbing Steel Pipes

Our factory specializes in the production of various steel pipes and fittings (such as elbows, tees, flanges, etc.), offering custom sizes, materials, and workmanship. Made from high-quality materials such as carbon steel and stainless steel, our products are highly resistant to high pressures and offer excellent sealing properties. They are widely used in the petroleum, chemical, water supply, and construction piping systems, ensuring reliable quality.

+86 15552138899

+86 15552138899

admin@globaltopsteel.com

◉ Product Details

Production Overview

Production Name: Polyurethane thermal insulation steel pipe
Materials: Stainless Steel/ Carbon Steel + PUR Form + PEH/HDPE/Galvanized/Aluminum etc

Wall thickness: 0.5mm-16mm
Length: 1m-12m or customized
Outer Diameter: 0.405-80 inch or 10.3mm – 2032mm
Insulation: PUR Foam
Operating temperature: Up to 140℃
Standard & Grades:

API 5L PSL1/ PSL2
ASTM A53,ASTM A252
GB/T9711.1
GB/T3091
SY/T 5037-2012
DIN1626
EN10219,EN10217

Ends: 30~35° beveled ends
Quality control: 100% X-Ray inspection
100% Hydraulic Pressure test
100% Ultrasonic inspection
Lining: Epoxy , cement motar, and according to customers requirement
Operating pressure: <1.6Mpa

Laid way: Buried, overhead, trench
Insulation material:

Fluoride-Free water foamed rigid polyurethane foam material (foam density: 60kg/m3-80kg/m³)

Inner surface tension of the high density polyethylene pipe: ≥50dy/cm

A pre-insulated pipe narmally consists of three parts:

Part 1: Carrier pipe (inside): stainless steel or carbon steel
Part 2: Insulating layer (Medium): Polyurethane foam (PUR Form)
Part 3: Protective jacket (outside casing): Plastic or Steel [Polyethylene (PEH), High Density Polythylene (HDPE), Galvanized, Aluminum etc]

Description	polyurethane thermal insulation steel pipe
Wall thickness	0.5mm-16mm
Length	1m-12m or customized
Outer Diameter	0.405-80 inch or 10.3mm – 2032mm
Insulation	PUR Foam
Operating temperature	Up to 140℃
Standard & Grades	ASTM A53,ASTM A252,GB/T9711.1,GB/T3091,SY/T 5037-2012,DIN1626,EN10219,EN10217
Ends	1) Beveled end 2) Plain end
Quality control	100% X-Ray inspection100% Hydraulic Pressure test100% Ultrasonic inspection
Pre-insulated pipe consists of three parts	Part 1: Carrier pipe (Inside): Stainless steel or Carbon steel
	Part 2: Insulating layer (Medium): Polyurethane foam (PUR Form)
	Part 3: Protective jacket (Outside casing): Plastic or steel (Polyethylene (PEH), High Density Polyethylene (HDPE), Galvanized, Aluminum etc)
Lining	Epoxy , cement motar, and according to customers requirement
Operating pressure	<1.6Mpa
Laid way	Buried, overhead, trench
Insulation materials	Fluoride-Free water foamed rigid polyurethane foam material (foam density: 60kg/m3-80kg/m³)
Inner surface tension of the high density polyethylene pipe	≥50dy/cm
Advantages	impact-proof, watertight, resistant to salt and chemicals, hygienic and non-corrosive
Customized	Carrier pipe, foam type and foam thickness, as well as the material for the jacket, can be customized according to the customer requirements

Materials of Thermal Pre-insulated steel pipe with HDPE Jacket
Item	Material	Notes
Service pipe/Carrier pipe	Steel pipe	API 5L PSL-1: GR.B X42, X46, X52, X60, X70 API 5L PLS-2: ISO3183-L245, L290, L320, L360, L415, L485
Insulation	Polyurethane foam (PUR) Nominal Density of 60⁺¹⁵̱₅ kg/m³	Compressive Strength: ≥ 0.300 Mpa
		Thermal Conductivity: ≤ 0.029 W/m·K@50℃
		Closed Cell Content: ≥90%
		Water Absorption: <5%
Insulation Jacket	High density polyethylene (HDPE)	As technical parameter

Main Indexes of Polyurethane insulation layer
Indexes	Preference standard	Unit	Standard requirement
Density	CJ/T114-4.3.2	kg/m³	≥60
Average	CJ/T114-4.3.1	mm	≤0.5
Percentage of close area	CJ/T114-4.3.1	%	≥ 88
Compressive strength	CJ/T114-4.3.3	MPa	≥ 0.3
Water absorption	CJ/T114-4.3.5	%	Immersion in boiling water 90 minute,bubble water absorption should be not more than 10%
Cavity	CJ/T114-4.3.1		≤ 0.033

◉ Product Show

Specification of pre-insulated pipe
Specifications	Steel pipe OD*Thickness (mm)	Outer protection tube diameter * wall thickness (mm)	Insulation Thickness (mm)	Unit weight (kgs/m)
32/90	32*2.8	90*2.5	26.5	3
45/110	45*2.8	110*2.5	30	4
57/120	57*3.0	120*2.5	29	6
60/125	60*3.5	125*3.0	29.5	7
76/140	76*4.0	140*3.0	29	9
89/160	89*4.0	160*3.0	32.5	11
108/180	108*4.0	180*3.0	33	13
133/200	133*4.5	200*3.2	30.3	17
159/250	159*4.5	250*3.9	41.6	22
219/315	219*6.0	315*4.9	43.1	39
273/365	273*6.0	365*5.6	40.4	49
325/420	325*7.0	420*7.0	40.5	67
377/500	377*7.0	500*7.8	53.7	81
426/560	426*7.0	560*8.8	58.2	94
478/600	478*7.0	600*8.8	52.2	104
529/630	529*7.0	630*9.8	40.7	114
529/655	529*7.0	655*9.8	53.2	117
630/760	630*8.0	760*11.5	53.5	158
720/850	720*8.0	850*12.0	53	181
820/960	820*10.0	960*14.0	56	252
920/1055	920*10.0	1055*14.0	53.5	281
1020/1155	1020*10.0	1155*14.0	53.5	312
1220/1380	1220*12.0	1380*16.0	64	444
1420/1602	1420*14.0	1602*16.0	75	590

Advantage of the pre-insulated pipe

1) Good insulation properties

2) Low heat loss

3) Heat loss is 25% of the traditional pipe

4) Energy saving

5) About 30 years move the service life, low cost

6) Has a strong waterproof and corrosive resistance and high mechanical strength

7) no attached trench, can be directly buried under ground or water

◉ Engineering Projects

Pipeline Connection
Corrugated board project
Machine Tool Workshop
Government Projects
Engineering Construction
Drilling Construction
Rebar Engineering
Bearing machining

◉ Company Profile

GLOBALSTEEL LLC is a comprehensive industrial product supplier integrating R&D, production, sales, and service. With years of experience in the metal products industry, we are committed to providing customers with a full range of products, including hardware accessories, flanges, various types of guardrails, cable trays, and high-strength bolts and nuts, as well as one-stop procurement solutions.

With our superior quality, reliable reputation, and flexible service, we have become a trusted partner for numerous domestic and international companies in the infrastructure construction, industrial manufacturing, energy and chemical industries, and other fields.

Looking forward to the future, GLOBALSTEEL LLC will continue to uphold the corporate spirit of "Striving for Excellence, Creating Quality Products" and continuously pursue technological innovation and quality breakthroughs. We look forward to working with you to create a brilliant future together!

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admin@globaltopsteel.com

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+86 15552138899

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