Directly buried steam pipe

Directly buried steam pipes are mainly used for steam transmission with a working pressure not exceeding 2.5MPa and a temperature not exceeding 350℃.

Categories:Direct-buried steam pipes

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Description

Our company’s directly buried steam pipes are prefabricated in the factory, offering advantages such as stable quality, convenient construction, and energy-saving with reduced losses.

Implementation standards

Transport medium	Superheated steam, saturated steam, heat transfer oil, etc.
Design pressure	P≤2.5MPa (When P＞2.5MPa, our company can customize production)
Design temperature	T≤350℃ (When T＞350℃, our company can customize production)
Execution standard	CJ/T246-2018
Service life	Not less than 30 years.

1) Working steel pipe

Steel pipe types (optional): seamless fluid pipe, submerged arc welded spiral steel pipe

2) Insulation layer

Material types (optional): asbestos-free microporous calcium silicate, high-temperature resistant centrifugal glass wool, aluminum silicate needle blanket, nano aerogel, rock wool, GQ composite silicate pipe shell

3) Outer steel pipe

Steel pipe types (optional): submerged arc welded spiral steel pipe, straight seam welded pipe

4) Outer anti-corrosion layer

Anti-corrosion types (optional): epoxy coal tar three cloth five oil, polyurea spray coating, 3PE, fiberglass resin, fusion bonded epoxy powder.

Product specifications

Specification (mm)	Outer diameter of working steel pipe × wall thickness (mm)	Outer diameter of outer protective steel pipe × wall thickness (mm)	Insulation layer thickness (mm)	Unit weight (kg/m)	Delivery length L (mm)
Specification (mm)	Outer diameter of working steel pipe × wall thickness (mm)		Insulation layer thickness (mm)	Unit weight (kg/m)	Seamless/ welded pipe	Spiral pipe
57/219	57×3.5	219×6.0	60	36	6400/12400	—
76/273	76×4.0	273×6.0	65	47	6400/12400	—
89/273	89×4.5	273×6.0	70	50	6400/12400	—
108/325	108×4.5	325×7.0	70	67	6400/12400	—
133/377	133×4.5	377×7.0	80	79	6400/12400	—
159/377	159×6.0	377×7.0	85	88	6400/12400	—
219/478	219×6.0	478×7.0	100	118	6400/12400	12000
273/529	273×6.0	529×7.0	105	130	6400/12400	12000
325/630	325×7.0	630×8.0	125	178	6400/12400	12000
377/720	377×7.0	720×8.0	140	239	6400/12400	12000
426/820	426×7.0	820×9.0	140	273	6400/12400	12000
478/820	478×7.0	820×9.0	140	287	6400/12400	12000
529/920	529×7.0	920×9.0	165	315	6400/12400	12000
630/1020	630×8.0	1020×10.0	165	372	6400/12400	12000
720/1120	720×10.0	1120×11.0	170	533	—	12000
820/1220	820×10.0	1220×12.0	170	558	—	12000
920/1320	920×10.0	1320×14.0	170	675	—	12000
1020/1420	1020×10.0	1420×14.0	170	734	—	12000

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Hebei Yuanfeng Pipeline Engineering Co., Ltd. was established in 2013 with a registered capital of 22.18 million yuan. It is a comprehensive R&D service enterprise focused on the production of steel jacketed steel direct-buried steam pipes, polyurethane direct-buried insulation pipes, spray-wound insulation pipes, galvanised iron overhead insulation pipes, PERT-II type insulation pipes, insulation pipe fittings, and joint installation. The company has strong production capabilities. Currently, it owns five production lines for polyurethane spray polyethylene wound prefabricated direct-buried insulation pipes, with an annual production of over 3,000 km of DN500mm-DN1600mm polyurethane spray polyethylene wound prefabricated direct-buried insulation pipes; 20 automatic winding machines for steel jacketed steel direct-buried steam insulation pipes, 8 sets of fully automatic pipe threading machines, 3 CNC intersecting line cutting machines, 2 pipeline fitting welding machines, 2 CNC plasma cutting machines, 10 external clamp cutting beveling machines, and 12 argon arc welders. It has 10 high-density polyethylene outer protective pipe production lines, with extrusion diameters reaching φ2000mm. The outer protective pipe production lines adopt advanced processes such as single-screw extrusion, vacuum sizing, corona treatment, spray cooling, and automatic cutting, capable of producing 30,000 tonnes of various types of high-density polyethylene outer protective pipes each year with diameters ranging from φ90-φ2000mm; 6 polyurethane prefabricated direct-buried insulation pipe production lines, 3 PU600 high-pressure foaming machines, capable of producing 5,000 km of DN20~DN1600mm insulation pipes; and 3 prefabricated overhead type polyurethane insulation pipe production lines, with an annual production of 2,000 km of DN25-DN1400mm prefabricated overhead type polyurethane insulation pipes. The company has production bases in Hebei, Inner Mongolia, Tianjin, and Liaoning, covering a total area of over 500 acres. The company's products cover China and more than 20 other countries and regions, including Mongolia, Russia, the Middle East, and South Africa. The products are mainly used for high-temperature steam transportation, central heating, and central cooling. Relying on advanced production technology, complete supporting equipment, and supply service systems, the company provides high-standard pipeline products to a wide range of customers, ensuring the safe operation of long-distance pipeline networks.

service@cnyufe.com

+86 4000-789-889

service@cnyufe.com

+86 4000-789-889