CN202546102U

CN202546102U - High-pressure thick-wall heavy-calibre seamless hot-pressing elbow

Info

Publication number: CN202546102U
Application number: CN201120579907XU
Authority: CN
Inventors: 高砚松; 高文兴; 程万林
Original assignee: HEBEI YADU PIPELINE EQUIPMENT GROUP CO Ltd
Current assignee: HEBEI YADU PIPELINE EQUIPMENT GROUP CO Ltd
Priority date: 2011-12-31
Filing date: 2011-12-31
Publication date: 2012-11-21
Anticipated expiration: 2021-12-31

Abstract

The utility model relates to a high-pressure thick-wall heavy-calibre seamless hot-pressing elbow in seamless steel tube manufacturing, belonging to the field of metal pipe fittings. The elbow comprises a bent section (1) and a straight pipe section (2); the elbow is resistant in high pressure and high temperature; the outer diameter D of the elbow ranges from 610mm to 1220mm, the wall thickness (3) ranges from 30mm to 150mm, the bending radius R is within 1.0-1.5D, and the length of the straight pipe section ranges from 0mm to 100mm; the elbow is uniform in overall wall thickness and attractive in appearance and is manufactured by using an advanced production and detection process; a product is high in quality and long in service life; 20% of manufacturing materials are saved; the production cost is low; the production efficiency is high; domestic and overseas high quality seamless steel tubes are used as the raw materials; the product meets the domestic and overseas standards and industrial standards; the elbow is widely used in industries such as petroleum, chemical industry, metallurgy, electricity, boilers, gas transmission, shipbuilding and the like, and is especially used relatively widely in four pipelines (main gas pipelines, hot section pipelines, cold section pipelines and high-pressure water supply pipelines) in a power plant.

Description

High pressure heavy wall large-calibre seamless hot-pressed elbow

Technical field

The utility model belongs to the metal pipe element field, relates to a kind of high pressure heavy wall large-calibre seamless hot-pressed elbow of seamless steel pipe compression moulding.

Background technique

Along with growing and scientific and technical the advancing by leaps and bounds of line transportation industry, the quality that pipeline is connected required bend pipe tools with bear pressure require increasingly high, demand is increasing.The diameter of usually generally acknowledging more than 600mm, working pressure is the heavy caliber high-pressure pipe member greater than 10.0MPa's.In known technology, small-bend radius (R=1.0D) high pressure heavy wall large caliber bend can't be processed with the method for welding and pushing, and weld ell and push-making angle fitting are difficult to satisfy present piping design to the discharge head requirement.

Summary of the invention

Be difficult to satisfy piping design to the discharge head requirement in order to overcome existing technology, the high pressure heavy wall large-calibre seamless hot-pressed elbow that the utility model provides a kind of seamless steel pipe to make.High pressure resistant high temperature resistant, the whole wall thickness of this elbow evenly, beautiful shape, manufacturing efficiency is high simultaneously, cost of production is low, advanced technology, reliable in quality, long service life.

The technological scheme that the utility model adopted is: high pressure heavy wall large-calibre seamless hot-pressed elbow is that the elbow body is weldless hot-pressed elbow; Comprise bending section (1), straight length (2); The relation of the radius of curvature R of described bending section (1) and elbow diameter D (or nominal diameter DN) is: 1.0D≤R≤1.5D; Said straight length (2) a1, a2 length are generally between 0～100mm; The angle θ of elbow is generally 10 °～90 °, and bending radius size, two ends flow development length, the big I of angle of bend are set as required.Said elbow forms through advanced and mature heat pressing process manufacturing, takes advanced detection means to ensure the quality of products.

Above-mentioned elbow diameter D at 610～1220mm, wall thickness (3) between 30～150mm, by material trademark be 20, seamless steel pipe such as 20G, A106B, A106C, WPB, WPC, St35.8, St45.8,15CrMoG, 12Cr1MoVG, 10CrMo910,10Cr9Mo1VNb, 15NiCuMoNb5, P11, P12, P91, P92, WB36 forms for the raw material manufacturing.

The pipe of above-mentioned elbow is the isosceles trapezoid pipeline section, is formed by the oblique symmetry cutting of seamless steel pipe, and longer face is that elbow outer arc, shorter face are arc in the elbow, after the hot pressing in arc the redundance material base can not appear, save raw material more than 20%.

Above-mentioned elbow meets country, industry, foreign standard GB/T 12459, DL/T 695, SH3408, SY/T 0510, HG/T 21635, ASME B16.9 etc. fully to requirement of products; And be widely used in industries such as oil, chemical industry, metallurgy, electric power, boiler, gas transmission, shipbuilding, especially in power station four large pipelines (main vapour, hot arc, cold section, high-pressure feed water), use comparatively extensive.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Fig. 1 is the utility model embodiment's a plan view.

Fig. 2 is the utility model embodiment's a right elevation.

Fig. 3 is the utility model embodiment raw material material base structural drawing.

Fig. 4 is the utility model embodiment raw material material base symmetry cutting schematic representation.

Mark among the figure: 1-bending section, 2-straight length, 3-wall thickness.

Embodiment

Like Fig. 1, shown in Figure 2; The utility model is provided with: bending section (1), straight length (2); The relation of the radius of curvature R of bending section (1) and elbow diameter D (or nominal diameter DN) is: 1.0D≤R≤1.5D; Straight length (2) a1, a2 length are generally between 0～100mm, and angle of bend θ is generally 10 °～90 °, and bending radius size, two ends flow development length, the big I of angle of bend are set as required.Like Fig. 3, the used pipe of the utility model shown in Figure 4 is the isosceles trapezoid pipeline section; Form by the oblique symmetry cutting of seamless steel pipe; Longer face is that elbow outer arc, shorter face are arc in the elbow, after the hot pressing in arc the unnecessary material base that is regardless of can not appear, save raw material more than 20%.Between 30～150mm, select domestic and international high-quality seamless steel pipe for use is raw material to said elbow diameter D at 610～1220mm, wall thickness (3).Adopt advanced and mature heat pressing process with the whole wall thickness that guarantees elbow evenly, beautiful shape, guarantee quality of product with advanced person's detection means.And the mode of taking to work continuously is to save the energy and to improve production efficient.

Claims

1. a high pressure heavy wall large-calibre seamless hot-pressed elbow comprises bending section (1), straight length (2), and it is characterized in that: the elbow body is weldless hot-pressed elbow.

2. high pressure heavy wall large-calibre seamless hot-pressed elbow according to claim 1; It is characterized in that: said elbow D outer diameter is that 610～1220mm, wall thickness (3) are 30～150mm; The radius of curvature R of bending section (1) and the relation of elbow diameter D are: 1.0D≤R≤1.5D; Said straight length (2) a1, a2 length are between 0～100mm, and angle of bend θ is 10 °≤θ≤90 °.

3. high pressure heavy wall large-calibre seamless hot-pressed elbow according to claim 1 is characterized in that: said elbow be by material trademark be 20, the seamless steel pipe of 20G, A106B, A106C, WPB, WPC, St35.8, St45.8,15CrMoG, 12Cr1MoVG, 10CrMo910,10Cr9Mo1VNb, 15NiCuMoNb5, P11, P12, P91, P92, WB36 forms for the raw material manufacturing.