In the pipeline system, the elbow is a pipe fitting that changes the direction of the pipeline. According to the angle, there are three most commonly used ones: 45° and 90°180°. In addition, it also includes other abnormal angle elbows such as 60° according to engineering needs. The elbow materials are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics.
The ways to connect with the pipe are: direct welding (the most common way) flange connection, hot melt connection, electrofusion connection, threaded connection and socket connection, etc. According to the production process, it can be divided into: welding elbow, stamping elbow, push elbow, casting elbow, butt welding elbow, etc. Other names: 90 degree elbow, right angle bend, etc.

Divided by material
Carbon steel: ASTM/ASME A234 WPB, WPC
Alloy: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP911, 15Mo3 15CrMoV, 35CrMoV
Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N
ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti
ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H
Low temperature steel: ASTM/ASME A402 WPL3-WPL 6
High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70

Cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon leaching, PVC, PPR, RFPP (reinforced polypropylene), etc.
According to the production method, it can be divided into pushing, pressing, forging, casting, etc.
According to the manufacturing standard, it can be divided into national standard, electric standard, ship standard, chemical standard, water standard, American standard, German standard, Japanese standard, Russian standard, etc.
According to its radius of curvature: it can be divided into long radius elbow and short radius elbow. The long radius elbow refers to the outside diameter of the pipe whose radius of curvature is equal to 1.5 times, that is, R=1.5D; the short radius elbow refers to its radius of curvature equal to the outside diameter of the pipe, that is, R=1.0D. (D is the diameter of the elbow, R is the radius of curvature).
According to the pressure level: there are about seventeen types, which are the same as the American pipe standards, including: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, SCH100, Sch120, Sch140, Sch160, XXS; among them the most commonly used are STD and XS.
According to different shapes and uses, it can be divided into: groove elbow, ferrule elbow, double bearing elbow, flange elbow, reducing elbow, seat elbow, internal and external tooth elbow, stamping elbow, push System elbow, socket elbow, butt welding elbow, inner wire elbow, etc.


HECHENG CENTURY METAL TECH CO.,LTD.,mainly produces heat-resistant steel casting, wear-resistant steel casting, corrosion-resistant steel casting,
sand casting, centrifugal casting, precision casting, forging, riveting and welding production, machining, heat treatment, final assembly, etc.
Our workshops are equipped with various modern processing equipment, static casting has the production capacity of single castings from 0.5Kg to 8000Kg;
silica sol casting has the production capacity of single castings from 0.05Kg to 500Kg; the production capacity of centrifugal casting is from φ50-φ1600,
and the forging workshop has forging orders The capacity of pieces is 5000Kg; it can be produced according to user's technical requirements.

In order to ensure the excellent performance of the product, it is equipped with complete testing methods such as desktop spectrometer, portable spectrometer,
 pendulum impact machine, non-destructive testing, large-scale water pump test bench, etc.
 The company's physical and chemical laboratory can accurately test C, S, P, Cr at any time , Ni, Si, Mn, W, Mo, V, N and other 24 kinds of elements,
and can carry out a variety of tests such as mechanical properties, physical properties, and auxiliary products. Complete testing methods, quality assurance, and system standardization.

Our company's products are widely used in heat treatment, metallurgical equipment, power equipment, mining equipment, petrochemical equipment, etc.
The main products are:
Furnace accessories: casting tray, cast baskets, casting fixtures, fan wheel, chain belt, muffle tank, heat exchanger, etc.
Sink rollers, stabilizing rollers, support rollers, support arms, cobalt bushes and sleeves for hot-dip galvanizing production lines.
Bottom rollers, radiant tubes, etc. for heat treatment furnaces in plate plants.
Water beam for the roller conveyor (cantilever roller) of the rolling mill walking furnace; the water beam slider for the furnace door, furnace door frame, and steel pushing furnace.

Petrochemical castings, high-temperature alloy furnace tubes, conversion tubes, cracking tubes, cast tube sheets, tube racks, etc.
Heat-resistant steel components used in the sintered pellet production line: such as chain links, grate plates, sprockets, shovel plates, side plates, small shafts, etc.
Calender rolls, flat drawing rolls, turning rolls, annealing furnace bottom rolls, cobalt alloy spinner discs, etc.
The roller ring furnace bottom roller used in the silicon steel plate line, W, U, I type radiant tube.
Cantilever rolls, air-cooled rolls, alignment rolls, spinning guide rolls, etc. for rods and wires.
Continuous annealing for steel pipe factory: hearth roll, straightening roll, sizing roll, two-roll cold rolling die, mandrel, guide plate, piercer roll, etc.

The company has always adhered to the business philosophy of "Sincere Service, Concentrating Customers"
and the quality policy of "pursuing a high starting point, creating zero defects, and satisfying customers."