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27152 results about "Pipe" patented technology

A pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow — liquids and gases (fluids), slurries, powders and masses of small solids. It can also be used for structural applications; hollow pipe is far stiffer per unit weight than solid members.

Method of thermally insulating coaxial pipes with a particulate insulating material

A method of thermally insulating the annular space in an element of an assembly of two coaxial pipes, the space being filled with a porous thermally insulating material, under low absolute gas pressure in which method the following steps are performed: a) the pipe element is inclined, preferably at an angle α of 5° to 30°, the annular space being closed at each end by respective closure pieces; and b) substantially all of the annular space is filled with the insulating material in the form of particles in bulk; and c) preferably said particles of insulating material are shaken, at least intermittently, as the annular space is filled in order to compact the insulating material, the annular space being maintained under high vacuum during filling.
Owner:SAIPEM SA

Micro-alloying steel for oil gas transport seamless pipeline and its preparation method

The invention discloses micro-alloying seamless pipeline steel and process for preparation. According to weight percentage, the range of the chemical components of the invention includes that C holds 0.08% to 0.20%, Si is equal to or less than 0.04%, Mn takes 0.60% to 1. 50%, S is equal to or less than 0.015%, P is equal to or less than 0.025%, Al is equal to or less than 0.04%, Ti is equal to or less than 0.04%, H is equal to or less than 2.5*10-4%, O is equal to or less than 25*10-4%, the rest is Fe and unavoidable foreign matters. The process for preparation comprises technique steps, including smelting, refining, continuous casting, hot rolling and slow cooling. Round steel with the size of phi 70 to 150 millimeters can be produced by the process for preparation. The seamless pipeline steel of the invention has perfect anti-sulphide stress corrosion (SSC resistance) capability and anti-HIC property. The pipeline steel which can substitute for welding pipe can be utilized in the filed of oil pipeline and the like, and the invention increases the reliability of material and adaptability of variety, in particular being adaptable for the low submarine temperature and corrosion-resistant environment and for manufacture of thick-walled tubes.
Owner:LAIWU IRON & STEEL GRP

Drilling and sealing method and sealing device for ultra-high pressure fracturing holes in underground coal mines

The invention discloses a drilling-sealing method and a sealing device of a coal mine underground ultrahigh pressure fracturing hole. The drilling-sealing method comprises the following steps: drilling a plugging hole on coal rock body; going on drilling a fracturing hole forward in the plugging hole; transmitting the sealing device into the plugging hole, enabling a water outlet hole of a fracturing pipe to stretch into the fracturing hole and enabling a taper sleeve sleeved on the fracturing pipe and made of soft material to plug on a hole opening of the fracturing hole; sealing by using polyurethane and solidifying for 30 minutes for 1 m length section at the hole opening of the plugging hole; and grouting cement slurry greater than 425 into the plugging hole with pressure by a grouting pipe, and solidifying for 48 hours after finishing grouting. The device comprises a grouting pipe and a slurry returning pipe and a fracturing pipe. The grouting pipe and the slurry returning pipe are arranged in the plugging hole. The grouting pipe, the slurry returning pipe and the fracturing pipe are connected integrally. A soft taper sleeve is arranged on the fracturing pipe. The soft taper sleeve is plugged at the hole opening of the fracturing hole. The invention has the advantages that the sealing method has high sealing success rate, good effect and wide application range; and the sealing device has simple structure and convenient operation.
Owner:重庆市能源投资集团科技有限责任公司 +1

Construction method of drilling follow casting pile used for building or bridge foundation

A method for constructing pipe piles while drilling for building or bridge foundations. The construction steps are to cover high-strength prestressed concrete pipes or steel pipes with drill pipes on the ground first, and install impactors and reaming retractable drill bits at the front ends of the drill pipes. , Follow the pipe while drilling, follow the pipe retaining wall, drill to the design elevation, stop drilling, withdraw from the reaming to shrink the drill bit, use the mud pump to clean the mud and sediment, pour concrete into the pipe, and simultaneously inject pressure grout to the outside of the pipe wall , stop when concrete and grout reach the ground; the object of the invention is to propose a construction method with fast construction speed, reliable quality, less material consumption, high bearing capacity of piles, mechanized operation, and environmental protection. In the construction method of bored cast-in-place piles, the use of mud retaining walls pollutes the environment, the hole is easy to collapse during the drilling process, the quality of concrete pouring is unstable, and the prestressed pipe piles are easy to cause the soil to rise. The strength of the pile body constructed by the invention is high. , There is no sediment at the bottom of the pile, and the pile end is completely rock-socketed, which can reach more than 2 times the bearing capacity of the same diameter bored pile.
Owner:GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD +1

Device and method for continuous block metal glass shaping

InactiveCN101543885ASolve the vacuum problemIncrease cooling intensityMetallic materialsPressure difference
The invention relates to a device and method for continuous block metal glass shaping, belonging to the technical field of metal material preparation. A heat insulating ring is arranged between a graphite casting mould and a water cooling copper mould which are arranged in a first vacuum chamber, an air cooler is arranged in a second vacuum chamber, and a traction rod enters the graphite casting mould and horizontally moves by a traction device. The method uses the graphite casting mould and the water cooling copper mould for primary main cooling and the air cooling mode for secondary auxiliary cooling, and the two vacuum chambers have a certain air-pressure difference. The device and the method have a high cooling speed, satisfy the requirements of the amorphous phase change of the block metal glass material. The shaping pressure of a metal melting body can be easily controlled, and the good shaping performance of the metal melting body is ensured by adjusting the pressure in the vacuum chambers. The metal passes through the graphite casting mould in a liquid state and is solidified in the water cooling copper mould, and the casting graphite casting mould has long service. The composite casting mould and the traction device have exchangeability to be convenient for realizing the continuous shaping of rod wires, boards, pipes and abnormal-shaped materials of different section sizes.
Owner:江苏苏州洲盛非晶科技有限公司

Method for detecting solid strength of grouting material for grouting connection of rebar sleeve and method for detecting grouting material construction quality

ActiveCN106769441AAccurate and fast detectionTo fill the technical gap in the means of solid strength inspectionMaterial strength using tensile/compressive forcesRebarGrout
The invention relates to a method for detecting solid strength of a grouting material for grouting connection of a rebar sleeve in a prefabricated concrete structure and a method for detecting grouting material construction quality. The method for detecting the solid strength of the grouting material comprises the following steps: during production of a precast concrete unit, casing pipes extending out of concrete surface by predetermined lengths are mounted at a grouting hole and a grout outlet hole of the grouting sleeve respectively and are not bonded with concrete; the casing pipes fully filled with a hardened grouting material are taken out of the concrete unit after grouting connection construction is finished and a specified age is reached; the hardened grouting material is taken out of the casing pipes and processed into a sample; compressive strength of the sample is tested, and the solid strength of the grouting material is obtained. Besides, the grouting material filling condition at the top in a chamber of the grouting sleeve can be observed by an interior peeping device, and whether missing grouting exists and the grouting fullness are checked; the method overcome the defect that the solid strength and fullness of the grouting material in the grouting sleeve cannot be detected directly in the prior art, so that the quality of actual grouting construction can be detected.
Owner:CHINA ACAD OF BUILDING RES

Casting high ferrochrome or casting high chromium steel roll for welding steel pipe

The invention provides a cast high chrome iron or cast high chrome steel roller used to roll weld steel tube and on straight-slim welding steel tube roller, or the like, wherein the cast high chrome iron roller comprises C in 1.8-2.8%, Si <=1.0%, Mn <=1.0%, P<=0.05%, S<=0.05%, Cr in 12-22%, Ni in 0.5-3.0%, Mo in 0. 0%, Ti in 0-0.3%, V in 0-1.0%, Cu in 0-1.0%, RE in 0.01-0.5%, and the left is Fe. The inventive roller has uniform organism, high abrasion resistance and flexibility, while its service life is 2-5 times of general product and material utilization can reach 70% or 80%, with low cost.
Owner:SHANDONG PROVINCE SIFANG TECHN DEV

Method and apparatus for supporting an insulated pipe

A method and apparatus for supporting a portion of a length of insulated pipe by a girder or other support structure, includes at least two pipe clamps, a base member, and a load transfer member attached to each of the at least two pipe clamps, wherein substantially none of the load, or forces and moments, exerted by the pipe, are carried, or transmitted, by the insulation disposed about the pipe.
Owner:PIPING TECHNOLOGY AND PRODUCTS

Risk evaluation and security management decision support system for town gas pipe

InactiveCN101488213AQuick Pipeline MaintenanceWide applicabilityData processing applicationsModularityCast iron
The invention provides a decision support system for risk assessment and safety management of quantitative / semi-quantitative town gas pipelines with a modularized component type structure. The system comprises an invalidation and failure database module, a risk assessment database module, a dynamic segmentation module, a risk assessment module and a decision support module. Assessment objects comprise pipeline auxiliary equipment such as steel pipes, cast iron pipes, PE pipes, valves, condenser cylinders, compensators and the like in two laying modes of burying and erection. The invalidation, failure and risk assessment database modules provide data support for risk computation; the dynamic segmentation module dynamically divides a pipe network into pipe sections convenient for management; the risk assessment module comprises a plurality of sub modules, and a user can selectively carry out risk computation; and the decision support module provides a decision reference basis for a manager. Based on investigating multiple gas companies, each module is established by combining scientific analysis, and can achieve active and dynamic management for the gas pipelines.
Owner:新奥(廊坊)燃气技术研究发展有限公司

Detection sorting device for steel balls

The invention relates to a detection sorting device for steel balls The detection sorting device comprises a rack, a feed mechanism, an unfolding mechanism, a stock stop, a detecting mechanism, a sorting mechanism and a material collecting mechanism, wherein the feed mechanism comprises a material storing box, a material discharging hopper and a material discharging pipe; the unfolding mechanism comprises a material transporting guide rail, the material transporting guide rail is a V-shaped linear guide rail, the material discharging hopper is connected with an initiating end of the material transporting guide rail through the material discharging pipe, and the detecting mechanism comprises a light source assembly and a camera assembly; the light source assembly is arranged on the material transporting guide rail in a sleeved mode, the sorting mechanism and the material collecting mechanism are arranged on the tail end of the material transporting guide rail, and the separate collection of defect steel balls and qualified steel balls are realized through the sorting mechanism and the material collecting mechanism. The detection sorting device provided by the invention has the advantages that the automatic feed, detection and sorting of the steel balls are realized, a detection process is that two-dimensional motion of a traditional unfolding disc is changed into single one-dimensional rolling of one-sided steel balls, the detection efficiency is high, a false drop ratio and an omission ratio are low, and the steel balls are not magnetized or the surfaces of the steel balls are not damaged in a detection process.
Owner:LUOYANG FANGZHI MEASUREMENT & CONTROL

Renovation reinforcement, reinforced and/or crack arrest technique for pipe

The invention relate to a method applicable to pipeline, in particular to a method of repairing reinforcing and / or strengthening a metallic pipe and a pipe crack arrest method, which is characterized in that: a part of a pipe needing repairing reinforcing and / or strengthening or needing crack arrest is firstly coated with insulating material, and then high strength fiber composite material is applied. As the materials used in the invention and the material used in the metallic pipe body portion a similar elastic modulus, the materials used in the invention can be integrated with the pipe body to bear pressure in the pipe together and finally form a bearing capacity required by the composite pipe, such as the original maximum working pressure of the pipe restored; furthermore, the materials used in the invention have good crack arrest function in case of a pipe burst accident. In addition, the insulating material used in the bottom layer completely removes the possibility of galvanic corrosion between the pipe and the reinforcing material. The method provided by the invention which has simple construction without fire work not only facilitates the close attaching between the reinforcing material and the pipe body and between reinforcing layers, but also enables repairing reinforcing and strengthening operations on pipelines in active service.
Owner:BEIJING SAFETECH PIPELINE

High-strength low-temperature steel with high hydrogen induced cracking (HIC) and sulfide stress corrosion cracking (SSC) resistance and manufacturing method thereof

The invention relates to high-strength low-temperature steel with high hydrogen induced cracking (HIC) and sulfide stress corrosion cracking (SSC) resistance and a manufacturing method thereof. A low alloy steel component system with ultra-low C content, low Si content, medium Mn content, low Als content, low N content, a little alloyed Ni and Mo and trace Ti and Nb is adopted, Mn/C is more than or equal to 22, the segregation index 1.32 (percent C)*[(1.53 (percent Mn)+1.37 (percent Si)+1.15 (percent Mo)+1.06 (percent Cr)+(percent Cu)+0.86 (percent Ni)]*[(30 (percent P)+10 (percent S)] is less than or equal to 0.060, [(percent Si)+(percent Als)]*(percent C) is less than or equal to 0.0035, Pcm is less than or equal to 0.018 percent, Nib/Ti is 1.5 to 3.5, Ca treatment is performed, Ca/S is 0.80 to 3.00, the microstructure of a finished steel plate product consists of uniform and fine acicular ferrites and a few upper bainites by optimizing a thermal mechanical control processing (TMCP) technology, and the average particle size is less than 10mu m; and the characteristics of high strength, toughness and HIC and SSC resistance are achieved, high heat input welding can be performed, and the steel is particularly suitable for manufacturing a low temperature storage tank, a low temperature pressure steel pipe, an ocean platform in an ice sea area, and the like.
Owner:BAOSHAN IRON & STEEL CO LTD

Anti-large-deformation pipe line steel prepared by thermal treatment method and preparation method thereof

The invention discloses anti-large-deformation pipe line steel prepared by a thermal treatment method and a preparation method thereof. The steel comprises the following chemical components of: not less than 0.02% and not greater than 0.12% of C, not less than 0.5% and not greater than 2.0% of Mn, not more than 0.25% of Si, not more than 0.02% of P, not more than 0.01% of S, not more than 0.11% of Nb, not more than 0.08% of V, not more than 0.05% of Ti, not more than 0.06% of Al, not more than 0.012% of N, not more than 0.50% of Cu, not more than 0.60% of Cr, not more than 0.50% of Mo, not more than 0.60% of Ni, not more than 0.005% of B, not more than 0.01% of Ca and the balance of Fe and inevitable impurities, wherein the CEIIW is not less than 0.3% and not greater than 0.45%, and the CEPcm is not more than 0.2%. The preparation method comprises the following steps of: heating steel at 700-950 DEG C in a thermal treatment furnace, maintaining the temperature for 6-15 min, cooling with the rate of 1-400 DEG C / s to room temperature, and simultaneously tempering from room temperature to 500 DEG C to obtain steel with ferrite as a first phase and bainite, martensite, degenerate perlite or any mixture thereof as a second phase. The steel has the advantages of high tensile strength, low yield strength, low yield ratio, high uniform elongation rate and high strain hardening exponent, thereby having good toughness and deformation performance.
Owner:NANJING IRON & STEEL CO LTD

Construction method for embedding pipe in ground source heat pump pouring pile reinforcement cage

The invention discloses a construction method for embedding a pipe in a ground source heat pump pouring pile reinforcement cage. A steel pipe is used for substituting for a solid reinforcing steel bar as the main rib of a pouring pile reinforcement cage, and a heat transmission pipe is embedded in the steel pipe, as a result, problems caused by binding and embedding the heat transmission pipe and the reinforcement cage, including mutual interference, high probability of corrosion of a reinforcing steel bar, effect on overall bearing capacity of a pile foundation and the like, are solved. Compared with the traditional way of binding and embedding the heat transmission pipe and the reinforcement cage, the construction method is higher in survival rate of embedded pipe, compactedness of concrete is high, and embedment of the heat transmission pipe surely does not lower the overall bearing capacity of the pile foundation; compared with another traditional way of drilling and pipe embedding, the construction method greatly shortens construction period and saves underground space and engineering cost. The construction method is simple in construction process, strong in operability, convenient for quality control, and remarkable in economic benefit and heat transmission effect.
Owner:HOHAI UNIV
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