About Us

Henan LIMING Heavy Industry Science and Technology Co. LTD which mainly manufacture large and medium-sized crushing and grinding equipments was founded in 1987. It is a modern joint-stock corporation with research, manufacturing and sales together. The Headquarter is located in HI-TECH Industry Development Zone of Zhengzhou and covers 80000 m ². Another workshop in Shangjie Industry Park covers 67000 m ². Over the more than 30 years, our company adheres to modern scientific management system, precision manufacturing, pioneering and innovation. Now LIMING has become the leader in domestic and oversea machinery manufacturing industry.

120

million

cubic meters

Industrial chain production base

70

national patents

689sets

national patents

170

Equipment service country

Company Culture

core values of the company

Create Value

Share Value

Observe Order

Respect Value

Service philosophy

Religious, fine, tight, and harmonious

LIMING spirit

Standardization, value, serialization, and differentiation will always exceed our contract

Brand Concept

Create and promote civilization, refine and interpret brilliantly

Business philosophy

Religious, meticulous, rigorous, and harmonious work

Our Global Footprint

Case Scene

concrete weight coating AL QAHTANI PIPE COATING

Concrete Weight Coatings are applied to Offshore Pipelines. Concrete Weight Coating on pipes ensures that gas and oil pipelines will not float (negative buoyancy) ones they are installed in sea and protects them against collision damage. To achieve concrete with a high density, iron ore is added. Concrete Weight Coating is always steamcured. This process

CONCRETE WEIGHT COATING - CWC - Bayou Companies

CONCRETE WEIGHT COATING Concrete weight coating is a plant-applied coating used to achieve negative buoyancy. Bayou has coated over 4.5 million feet of pipe with concrete weight coating to date.

Concrete Weight Coating - Offshore Pipeline - Bayou

Concrete Weight Coating Concrete weight coating (CWC) is a plant-applied coating used to provide negative buoyancy for offshore pipelines or for river or road crossing applications. Bayou’s mobile plants have the capability of handling both domestic and international projects.

MECHANICAL PROPERTIES OF HEAVY WEIGHT CONCRETE USING

Density concrete is commonly used for radiation shielding of nuclear-reactors and other structures like counter weights, coating of off-shore pipelines. Density concrete or heavy weight concrete is designed by using heavy weight aggregates such as hematite, magnetite, barite etc. The material is called hematite is used in this special concrete.

Concrete weight coating for offshore pipelines LKAB ...

Compression concrete weight coating. Using this applying method, the pipe gets a concrete weight coating by rolling the heavy concrete with a special technique against the pipeline. Independent of the applying method you prefer, MagnaDense is suitable for both. The coarse aggregate increases the weight of concrete.

Concrete weight coating - tubescoating

Concrete weight coating (CWC) is a plant-applied coating used to provide negative buoyancy for offshore pipelines or for river or road crossing applications in accordance with DVGW GW 340. We utilise the compression wrap method of application which keeps the anti-corrosion coating free of damage.

Effect of Water-Cement Ratio on Concrete Weight Coatings

01/05/2018  Zero-slump concrete can be used for weight coating of steel pipes used for the underwater transmission of natural gas, primarily to provide negative buoyancy for the pipe sections. This concrete is prepared using heavyweight (iron ore) aggregates and typically has a water-cement ratio of 0.33. Results of the study described in this article indicate that void contents can be reduced using

Anti Corrosion Coating for Subsea Pipeline Subsea ...

17/02/2016  Concrete weight coating is used when stability of the pipeline on the seabed is an issue. The two common densities of concrete that are used are 140 lbs/cu. ft and 190 lbs/cu. ft. Higher density is obtained by adding iron ore to the concrete mix. Recently, higher density iron ore has been used to obtain concrete density ranging from 275 to 300 lbs/cu. ft for the Ormen Lange pipeline in the ...

Welcome to AL QAHTANI PIPE COATING INDUSTRIES

Concrete Weight Coatings are applied to Offshore Pipelines. Concrete Weight Coating on pipes ensures that gas and oil pipelines will not float (negative buoyancy) ones they are installed in sea and protects them against collision damage. To achieve concrete with a high density, iron ore is added. Concrete Weight Coating

CONCRETE WEIGHT COATING - CWC - Bayou Companies

A calculated mixture of cement, sand, iron ore and wire wrap is applied to a predetermined thickness and density level; Coating Components . The concrete weight coating system is typically used in conjunction with other coating systems such as FBE and 3LPP/E. Bayou uses various methods to avoid slippage between the concrete layer and anti-corrosion coating. These include adding a rough-coat ...

MECHANICAL PROPERTIES OF HEAVY WEIGHT CONCRETE USING

Heavy weight iron-ore is used as the main ingredient of the high density concrete mix for concrete coating of sub-merged marine pipelines which is transportation of petroleum materials like importing crude oil and domestic gas, desired heavyweight concrete is usually used for radiation shielding, counter weights. Radiation shielding is generally used in nuclear power plants to protect against ...

Concrete Weighting - Ersai

Concrete weight coating, storage and load out of more than 25,000 pipes; construction of 2 floating winches. Procurement of 100,000 tons of iron ore, 25,000 tons of cement and other aggregates and materials for pipes coating. tough projects in safe hands. [email protected] Republic of Kazakhstan, 050010, Almaty, Kazybek bi str. 41, Park Palace . Tel: +7 7272 508 251/52 (3000) Republic of ...

Concrete weight coating - tubescoating

Concrete weight coating (CWC) is a plant-applied coating used to provide negative buoyancy for offshore pipelines or for river or road crossing applications in accordance with DVGW GW 340. We utilise the compression wrap method of application which keeps the anti-corrosion coating free of damage. Concrete is applied by wrapping a uniform layer while simultaneously wrapping reinforcing wire ...

Effect of Water-Cement Ratio on Concrete Weight Coatings

01/05/2018  Zero-slump concrete can be used for weight coating of steel pipes used for the underwater transmission of natural gas, primarily to provide negative buoyancy for the pipe sections. This concrete is prepared using heavyweight (iron ore) aggregates and typically has a water-cement ratio of 0.33. Results of the study described in this article indicate that void contents can be reduced using

Design Mix Optimization of Heavy Weight Concrete

The annual production of heavy concrete in PT XYZ is about 75,000 upto 100,000 metric tons which consist of approximately 83% heavy aggregate (i.e. iron ore), 12% portland cement, and 5% water. To improve the competitive advantage of the company, PT XYZ intends to modify the existing design mix by adding certain amount of medium density material (e.g. crushed stone) in to the mixture while ...

New Method for Concrete Coating of Marine Linepipe

03/05/1993  It was observed by the newcomers to the pipe coating industry that theheavy-weight concrete coating was obtained by adding iron ore to a concretemix, which through the throwing action of the impingement method resulted in acomparatively porous coating. Furthermore, a cement content of 500–600kg/m 3 was required to make the no-slump mix stick to the rotatingpipe. In the construction

Anti Corrosion Coating for Subsea Pipeline Subsea ...

17/02/2016  Concrete weight coating is used when stability of the pipeline on the seabed is an issue. The two common densities of concrete that are used are 140 lbs/cu. ft and 190 lbs/cu. ft. Higher density is obtained by adding iron ore to the concrete mix. Recently, higher density iron ore has been used to obtain concrete density ranging from 275 to 300 lbs/cu. ft for the Ormen Lange pipeline in the ...

Pipeline Buoyancy - EPCM Holdings

Large-diameter pipelines require thicker concrete coating, the density of the concrete mixture can be increased by adding materials of higher density e.g. iron ore. 3.4 Use of Concrete Collars. Concrete collars are precast concrete weight, they can be moulded into different shapes depending on project requirement. The weight of each collar must ...

Mass, Weight, Density or Specific Gravity of Bulk Materials

94. 1506. Hematite ( iron ore ) 318-325. 5095 - 5205. Hemimorphite ( zinc ore ) 212-218. 3395 - 3490. Hydrochloric acid 40%.

Concrete Weighting - Ersai

Concrete weight coating, storage and load out of more than 25,000 pipes; construction of 2 floating winches. Procurement of 100,000 tons of iron ore, 25,000 tons of cement and other aggregates and materials for pipes coating. tough projects in safe hands. [email protected] Republic of Kazakhstan, 050010, Almaty, Kazybek bi str. 41, Park Palace . Tel: +7 7272 508 251/52 (3000) Republic of ...

Effect of Water-Cement Ratio on Concrete Weight Coatings

01/05/2018  Zero-slump concrete can be used for weight coating of steel pipes used for the underwater transmission of natural gas, primarily to provide negative buoyancy for the pipe sections. This concrete is prepared using heavyweight (iron ore) aggregates and typically has a water-cement ratio of 0.33. Results of the study described in this article indicate that void contents can be reduced using

Wasco Coatings orders 1.3 million tonnes of iron ore from ...

iron ore from LKAB Minerals AB, based in Luleå, Sweden. The iron ore will be used for the concrete coating of the steel pipes needed to build the planned Nord Stream 2 Pipeline. A heavy high-density concrete coating will be applied to each of the approximately 200,000 pipes to add weight, so that they remain in place on the seabed. LKAB Minerals AB, Karlshamn Hamn AB and MMT Sweden AB are ...

Design Mix Optimization of Heavy Weight Concrete

The annual production of heavy concrete in PT XYZ is about 75,000 upto 100,000 metric tons which consist of approximately 83% heavy aggregate (i.e. iron ore), 12% portland cement, and 5% water. To improve the competitive advantage of the company, PT XYZ intends to modify the existing design mix by adding certain amount of medium density material (e.g. crushed stone) in to the mixture while ...

New Method for Concrete Coating of Marine Linepipe

03/05/1993  It was observed by the newcomers to the pipe coating industry that theheavy-weight concrete coating was obtained by adding iron ore to a concretemix, which through the throwing action of the impingement method resulted in acomparatively porous coating. Furthermore, a cement content of 500–600kg/m 3 was required to make the no-slump mix stick to the rotatingpipe. In the construction

Concrete Weight Coating Shawcor

Concrete weight coating provides reliable negative buoyancy as well as protection from harsh environments and mechanical damage that can occur—to both the pipe and its thermal insulation coating—during handling, transportation and pipe installation. A concrete pipe coating can be applied over anti-corrosion and thermal insulation systems and applied in different densities to meet each ...

Anti Corrosion Coating for Subsea Pipeline Subsea ...

17/02/2016  Concrete weight coating is used when stability of the pipeline on the seabed is an issue. The two common densities of concrete that are used are 140 lbs/cu. ft and 190 lbs/cu. ft. Higher density is obtained by adding iron ore to the concrete mix. Recently, higher density iron ore has been used to obtain concrete density ranging from 275 to 300 lbs/cu. ft for the Ormen Lange pipeline in the ...

Pipe Coating: Pipecoating Part 3

29/10/2010  To allow for higher than normal concrete densities, the concrete mix often contains Iron Ore as a constituent part of the concrete mix. Concrete coating is usually applied to pipes that have already received an anti corrosion coating, typically coatings are, Asphalt Enamel, Three layer Polyethylene or Polypropylene and to a lesser extent Fusion Bonded Epoxies. For added corrosion

Mass, Weight, Density or Specific Gravity of Bulk Materials

94. 1506. Hematite ( iron ore ) 318-325. 5095 - 5205. Hemimorphite ( zinc ore ) 212-218. 3395 - 3490. Hydrochloric acid 40%.

Influence of Coating Granulation Process on Iron Ore ...

For better blast furnace performance, there has always been a need for better quality raw materials like sinter, lump ore, and pellets. Among these raw materials the usage of sinter in blast furnace ...

Concrete Weighting - Ersai

Concrete weight coating, storage and load out of more than 25,000 pipes; construction of 2 floating winches. Procurement of 100,000 tons of iron ore, 25,000 tons of cement and other aggregates and materials for pipes coating. tough projects in safe hands. [email protected] Republic of Kazakhstan, 050010, Almaty, Kazybek bi str. 41, Park Palace . Tel: +7 7272 508 251/52 (3000) Republic of ...

Effect of Water-Cement Ratio on Concrete Weight Coatings

01/05/2018  Zero-slump concrete can be used for weight coating of steel pipes used for the underwater transmission of natural gas, primarily to provide negative buoyancy for the pipe sections. This concrete is prepared using heavyweight (iron ore) aggregates and typically has a water-cement ratio of 0.33. Results of the study described in this article indicate that void contents can be reduced using

Wasco Coatings orders 1.3 million tonnes of iron ore from ...

iron ore from LKAB Minerals AB, based in Luleå, Sweden. The iron ore will be used for the concrete coating of the steel pipes needed to build the planned Nord Stream 2 Pipeline. A heavy high-density concrete coating will be applied to each of the approximately 200,000 pipes to add weight, so that they remain in place on the seabed. LKAB Minerals AB, Karlshamn Hamn AB and MMT Sweden AB are ...

Design Mix Optimization of Heavy Weight Concrete

The annual production of heavy concrete in PT XYZ is about 75,000 upto 100,000 metric tons which consist of approximately 83% heavy aggregate (i.e. iron ore), 12% portland cement, and 5% water. To improve the competitive advantage of the company, PT XYZ intends to modify the existing design mix by adding certain amount of medium density material (e.g. crushed stone) in to the mixture while ...

New Method for Concrete Coating of Marine Linepipe

03/05/1993  It was observed by the newcomers to the pipe coating industry that theheavy-weight concrete coating was obtained by adding iron ore to a concretemix, which through the throwing action of the impingement method resulted in acomparatively porous coating. Furthermore, a cement content of 500–600kg/m 3 was required to make the no-slump mix stick to the rotatingpipe. In the construction

Concrete Weight Coating Shawcor

Concrete weight coating provides reliable negative buoyancy as well as protection from harsh environments and mechanical damage that can occur—to both the pipe and its thermal insulation coating—during handling, transportation and pipe installation. A concrete pipe coating can be applied over anti-corrosion and thermal insulation systems and applied in different densities to meet each ...

CONCRETE WEIGHT COATING FOR PIPELINE

21/11/2011  Concrete coating is intended to: Achieve the required negative bouyancy/submerged weight (due to Lateral and Vertical Stability) Provide an additional mechanical protection (if needed) and also can provide thermal insulation (if needed) To achieve the purposes stated above, the material of concrete weight coating for pipeline consist of: Cement Concrete Weight Coating is matriced by

CONCRETE COATING APPLICATION DUNIA INFORMASI

4.1 CONTRACTOR shall select the proportions of cement, sand, aggregate and iron ore to produce the specified concrete density, ... 5.3 If normal ambient air temperature does not exceed 30 ° C. Concrete weight coating shall take place only if the pipe temperature and ambient air temperatures are within the range of 5 o C to 30 o C, unless coating takes place in areas shaded from direct ...

Mass, Weight, Density or Specific Gravity of Bulk Materials

94. 1506. Hematite ( iron ore ) 318-325. 5095 - 5205. Hemimorphite ( zinc ore ) 212-218. 3395 - 3490. Hydrochloric acid 40%.

Influence of Coating Granulation Process on Iron Ore ...

For better blast furnace performance, there has always been a need for better quality raw materials like sinter, lump ore, and pellets. Among these raw materials the usage of sinter in blast furnace ...