Full catalogue / Steel-plastic composite pipes

LESSO · ARMENIA

Steel-plastic composite pipes

Pipes and Fittings

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Steel-plastic composite pipes · Manufacturer image

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Product families

The range includes the following product families. Dimensions and operating limits depend on the selected series and product configuration.

PE-lined steel pipe for cold water
PE-RT-lined steel pipe for hot water
PP-R-lined steel composite pipe
Plastic-lined seamless steel pipe
PE-coated composite pipe and fittings
EP-coated fire protection pipe and fittings
304 stainless steel bushing
Meter manifold
Electrical hot-dip plastic steel pipe
Plastic-coated spiral steel pipe

Technical specifications

Parameter	Value
Standard	GB/T 28897-2021
Pipe length	6 m
PE lining maximum temperature	40 °C
PE-RT lining maximum temperature	70 °C
Lined pipe working pressure	≤1.6 MPa

Product photographs (162)

Product types, photographs and specifications

Catalogue 2024.06 · quotation 2024.04.23. The catalogue and quotation cover different size ranges. The tables below retain the catalogue dimensions. Photographs identify the product family, not every diameter.

PP-R-lined steel composite pipe

Steel + PP-R lining. Cold and hot water. CJ/T 137-2008.

PE-coated steel composite pipe

Steel base pipe + PE coating. DN15–DN300; catalogue length 6000 +20 mm.

Plastic-coated steel electrical conduit

Coated steel conduit for cable protection. Coating thickness ≥300 μm.

Plastic-coated spiral steel pipe

Steel + PE or EP coating. DN200–DN2400; standard length 12 m.

Source: LESSO Walton product manual 2024.06, pp. 15–36. Quotation: 2024.04.23.

Product specifications and model tables

Expand the product family to view its listed models and dimensions.

Plastic-lined steel pipe · lining thickness

Diameter (mm)	Size (in)	Lining thickness (mm)	Length (m)
15	1/2	1.5 ±0.2	6 (+0.015)
20	3/4	1.5 ±0.2	6 (+0.015)
25	1	1.5 ±0.2	6 (+0.015)
32	1-1/4	1.5 ±0.2	6 (+0.015)
40	1-1/2	1.5 ±0.2	6 (+0.015)
50	2	1.5 ±0.2	6 (+0.015)
65	2-1/2	1.5 ±0.2	6 (+0.015)
80	3	2.0 ±0.2	6 (+0.015)
100	4	2.0 ±0.2	6 (+0.015)
125	5	2.0 ±0.2	6 (+0.015)
150	6	2.5 ±0.2	6 (+0.015)
200	8	2.5 ±0.2	6 (+0.015)
250	10	3.0 ±0.5	6 (+0.015)
300	12	3.0 ±0.5	6 (+0.015)

PE-lined steel pipe · cold water

Diameter (mm)	Size (in)	Material / configuration	Design pressure (MPa)	Long-term temperature (°C)	Length (m)
15	1/2	PE	≤1.6	≤40	6
20	3/4	PE	≤1.6	≤40	6
25	1	PE	≤1.6	≤40	6
32	1-1/4	PE	≤1.6	≤40	6
40	1-1/2	PE	≤1.6	≤40	6
50	2	PE	≤1.6	≤40	6
65	2-1/2	PE	≤1.6	≤40	6
80	3	PE	≤1.6	≤40	6
100	4	PE	≤1.6	≤40	6
125	5	PE	≤1.6	≤40	6
150	6	PE	≤1.6	≤40	6
200	8	PE	≤1.6	≤40	6
250	10	PE	≤1.6	≤40	6
300	12	PE	≤1.6	≤40	6

Types I / II; grooved versions are listed from DN50 to DN300. Standard: GB/T 28897-2021.

PE-RT-lined steel pipe · hot water

Diameter (mm)	Size (in)	Material / configuration	Design pressure (MPa)	Long-term temperature (°C)	Length (m)
15	1/2	PE-RT	≤1.6	≤70	6
20	3/4	PE-RT	≤1.6	≤70	6
25	1	PE-RT	≤1.6	≤70	6
32	1-1/4	PE-RT	≤1.6	≤70	6
40	1-1/2	PE-RT	≤1.6	≤70	6
50	2	PE-RT	≤1.6	≤70	6
65	2-1/2	PE-RT	≤1.6	≤70	6
80	3	PE-RT	≤1.6	≤70	6
100	4	PE-RT	≤1.6	≤70	6
125	5	PE-RT	≤1.6	≤70	6
150	6	PE-RT	≤1.6	≤70	6
200	8	PE-RT	≤1.6	≤70	6
250	10	PE-RT	≤1.6	≤70	6
300	12	PE-RT	≤1.6	≤70	6

Types I / II; grooved versions are listed from DN50 to DN300. Standard: GB/T 28897-2021.

PE-lined seamless steel pipe · cold water

Outside diameter (mm)	Size (in)	Wall thickness (mm)	Pieces per bundle	Length (m)
76	2-1/2	4	37	6
89	3	4	19	6
114.3	4	4	19	6
159	6	4.5	10	6
168	6	5	10	6
219	8	6	7	6
273	10	7	3	6
325	12	8	3	6

Seamless composite range: rated working pressure ≤2.5 MPa; cold water ≤40 °C / PE-RT hot-water lining ≤70 °C.

304 stainless steel end bushings

Diameter (mm)	Size (in)	Pieces per carton
50	2	300
65	2-1/2	300
80	3	200
100	4	100
125	5	60
150	6	60
200	8	30
250	10	10
300	12	5

PE-lined pipe with stainless end bushings

Diameter (mm)	Size (in)	Wall thickness (mm)	Pieces per bundle	Length (m)
50	2	3.5	37	6
65	2-1/2	3.75	37	6
80	3	3.75	19	6
100	4	3.75	19	6
125	5	3.75	10	6
150	6	4.25	10	6
200	8	5.5	7	6
250	10	6	3	6
300	12	6	3	6

EP-coated fire protection pipe

Diameter (mm)	Size (in)	Design pressure (MPa)	Length (m)
15	1/2	≤1.6	6
20	3/4	≤1.6	6
25	1	≤1.6	6
32	1-1/4	≤1.6	6
40	1-1/2	≤1.6	6
50	2	≤1.6	6
65	2-1/2	≤1.6	6
80	3	≤1.6	6
100	4	≤1.6	6
125	5	≤1.6	6
150	6	≤1.6	6
200	8	≤1.6	6
250	10	≤1.6	6
300	12	≤1.6	6

Inner and outer coating; GB/T 5135.20-2010.

Single-household meter manifold · model dimensions

Model	Diameter (mm)	Branch diameter (mm)	A (mm)	B (mm)	C (mm)	D (mm)
DN4019015	40	15	105	35	190	105
DN4019020	40	20	105	35	190	105
DN4019025	40	25	105	35	190	105
DN5019015	50	15	105	35	190	105
DN5019020	50	20	105	35	190	105
DN5019025	50	25	105	35	190	105
DN6519015	65	15	105	35	190	105
DN6519020	65	20	105	35	190	105
DN6519025	65	25	105	35	190	105

Standard, 180° rib and 90° angle versions; Q/LSWT 10-2022.

Multiple-household meter manifold · model dimensions

Model	Diameter (mm)	Branch diameter (mm)	A (mm)	B (mm)	C (mm)	D (mm)
DN4016015/20	40	15 / 20	70	35	160	145
DN4017015/20	40	15 / 20	70	35	170	155
DN4018515/20	40	15 / 20	70	35	185	170
DN5016015/20	50	15 / 20	70	35	160	145
DN5017015/20	50	15 / 20	70	35	170	155
DN5018515/20	50	15 / 20	70	35	185	170
DN5018525	50	25	70	35	185	170
DN6516015/20	65	15 / 20	70	35	160	145
DN6518515/20	65	15 / 20	70	35	185	170
DN6518525	65	25	70	35	185	170

Standard and 180° layouts; standard assemblies for 2–6 households. Q/LSWT 10-2022.

Plastic-lined threaded fittings · types I / II

Photo	Model	Product configuration
	90	90° elbow
	120	45° Elbow
	130	Tee
	180	Cross
	291	Cap
	280	Male threaded connector
	270	Female threaded connector
	330	Union
	90R	90° reducing elbow
	130R	Reducing tee
	180R	Reducing cross
	240	Reducing coupling
	241	Reducing bushing

PE coating · inner and outer · threaded fittings

Photo	Model	Product configuration
	90	90° elbow
	120	45° Elbow
	130	Tee
	180	Cross
	291	Cap
	280	Male threaded connector
	270	Female threaded connector
	330	Union
	90R	90° reducing elbow
	130R	Reducing tee
	180R	Reducing cross
	240	Reducing coupling
	241	Reducing bushing

PE coating · inner and outer · grooved fittings

Photo	Model	Product configuration
	105	11.25° elbow
	110	22.5° elbow
	120	45° Elbow
	90	90° elbow
	90R	90° reducing elbow
	130	Tee
	180	Cross
	130R	Reducing tee
	131R	Threaded tee
	181	Threaded cross
	240	Grooved reducing coupling
	230	Eccentric grooved reducer
	230N	Eccentric grooved female threaded reducer
	240N	Grooved female threaded reducer
	321	Adapter flange
	321G	Weld flange
	1G	Rigid coupling
	1N	Flexible coupling
	300	End cap
	3J	Threaded mechanical tee
	3G	Grooved mechanical tee

PE inner coating · threaded fittings

Photo	Model	Product configuration
	90	90° elbow
	120	45° Elbow
	130	Tee
	180	Cross
	291	Cap
	280	Male threaded connector
	270	Female threaded connector
	330	Union
	90R	90° reducing elbow
	130R	Reducing tee
	180R	Reducing cross
	240	Reducing coupling
	241	Reducing bushing

PE inner coating · grooved fittings

Photo	Model	Product configuration
	105	11.25° elbow
	110	22.5° elbow
	120	45° Elbow
	90	90° elbow
	90R	90° reducing elbow
	130	Tee
	180	Cross
	130R	Reducing tee
	131R	Threaded tee
	181	Threaded cross
	240	Grooved reducing coupling
	230	Eccentric grooved reducer
	230N	Eccentric grooved female threaded reducer
	240N	Grooved female threaded reducer
	321	Adapter flange
	321G	Weld flange
	1G	Rigid coupling
	1N	Flexible coupling
	300	End cap
	3J	Threaded mechanical tee
	3G	Grooved mechanical tee

EP fire protection coating · threaded fittings

Photo	Model	Product configuration
	90	90° elbow
	120	45° Elbow
	130	Tee
	180	Cross
	291	Cap
	280	Male threaded connector
	270	Female threaded connector
	330	Union
	90R	90° reducing elbow
	130R	Reducing tee
	180R	Reducing cross
	240	Reducing coupling
	241	Reducing bushing

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