Information on the most widely used ASTM standards within the materials testing industry
Model: GGW-60H, ISO 8491
GGW-60H "Welded (Low Pressure Fluid) Steel Pipe Bending Testing Machine" is a special equipment for plane bending test of metal steel pipe.
The product is widely used in inspection units, metal pipe factories and pipeline enterprises to test the bending performance of metal pipes. Conform with ISO 8491 "Metal material tube bending test method". metal tube bend test methods.
GGW-60 welding (low pressure fluid) steel pipe bending testing machine is based on GW-40 steel bending testing machine based on the development of products, for different nominal caliber steel pipe specimens only need to replace the corresponding bending sleeve, adjust the bending radius and replace the roller, the equipment accuracy is reliable, easy to use, long service life, is currently the most complete welding (low pressure fluid) steel pipe bending testing machine.
General Introduction
GGW-60H "Welded (Low Pressure Fluid) Steel Pipe Bending Testing Machine" is a special equipment for plane bending test of metal steel pipe.
It's for below standard:
ISO 8491:1998 Metallic materials — Tube (in full section) — Bend test
ISO 5173:2023 Destructive tests on welds in metallic materials — Bend tests
ASTM A370-22 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
The equipment is a new product developed according to ISO 8491:1998 "Metal material tube bending test method".
It is suitable for metal pipe bending test methods specified in GB/T13793-2016 "Straight Seam Electric Welded Steel Pipe", GB/T3091-2015 "Welded Steel Pipe for Low Pressure Fluid Transportation", GB/T8162-2008 "Seamless Steel Pipe for Structure" and other standards. GB/T3091-2015 "Welded steel pipe for low-pressure fluid transportation" (outer diameter not more than 60.3mm (≤Φ60.3mm) welded pipe) standard in chapter 5.5 process performance in the steel pipe bending test, has been unable to complete this test efficiently and standardly, UnitedTest technical personnel combined with relevant experts and testing units, successfully developed a welding (low pressure fluid) steel pipe special bending testing machine, can efficiently complete GB/T3091-2015 "low pressure fluid transportation with welded steel pipe" Chapter 5.5.1 Process Performance: Steel Tube Bending Test.

The product is widely used in inspection units, metal pipe factories and pipeline enterprises to test the bending performance of metal pipes.
GGW-60 welding (low pressure fluid) steel pipe bending testing machine is based on GW-40 steel bending testing machine based on the development of products, for different nominal caliber steel pipe specimens only need to replace the corresponding bending sleeve, adjust the bending radius and replace the roller, the equipment accuracy is reliable, easy to use, long service life, is currently the most complete welding (low pressure fluid) steel pipe bending testing machine.
Main Technical Specification
| Model | GGW-60H |
| Curved steel pipe nominal diameter range (DN) | DN6(Φ10.2) ,DN8(Φ13.5) ,DN10(Φ17.2) ,DN15(Φ21.3), DN20(Φ26.9) , DN25(Φ33.7), DN32(Φ42.4), DN40(Φ48.3), DN50(Φ60.3) |
| Steel pipe bending angle | 0°-90° free setting(Customized 0°-180° free setting available) |
| Roller operating speed | ≤1.4 r/min |
| Bending angle control accuracy | ±1.5° |
| Equipped with bent sleeve radius R (6 times diameter) for steel pipe | Φ21.3mm×6≈127.8mm;Φ26.9mm×6≈161.4mm;Φ33.7mm×6≈202.2mm;Φ42.4mm×6≈254.4mm;Φ48.3mm×6≈289.8mm;Φ60.3mm×6≈361.8mm Optional: Φ10.2mm×6≈61.2mm;Φ13.5mm×6≈81mm;Φ17.2mm×6≈103.2mm; |
| Wheel radius | R5, R6.8, R8.6, R10.7, R13.5, R16.9, R21, R24.2, R30.2 |
| Test control methods |
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| Motor power | 1.5kw |
| Dimension | 970×760×1170mm |
| weight | 700kg |
Main Accessories
Standard
ISO 8491 define a unified bend test method for evaluating the plastic bending ductility of circular full-section metallic tubes, exclusively for tubes with outer diameter D ≤ 65 mm (product standards may narrow this diameter range further).
Main Industry fields: boilers & pressure vessels, oil & gas pipelines, automotive (exhaust/chassis tubing), heat exchangers, structural steel tubing, power generation (including nuclear).
EN 10232 is the European version of ISO 8491,defines a unified cold bend test for intact circular full-section metallic tubes, designed to quantify plastic bending ductility for tubes with outer diameter D ≤ 65 mm.
ISO 7438 is a standard that specifies a method for determining the ability of metallic materials to undergo plastic deformation in bending. It is used to evaluate the flexural strength and stiffness of a material , The bend test shall be carried out in testing machines equipped with a bending device with two supports and a former; bending device with a V-block and a former; bending device with a clamp.
ASTM A370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
ASTM A370 test methods cover procedures and definitions for the mechanical testing of steels, stainless steels, and related alloys. The various mechanical tests herein described are used to determine properties required in the product specifications. Variations in testing methods are to be avoided, and standard methods of testing are to be followed to obtain reproducible and comparable results. In those cases in which the testing requirements for certain products are unique or at variance with these general procedures, the product specification testing requirements shall control.
Covering tests like Tension, Bend, Hardness, Brinell, Rockwell, Portable, and Impact, each catering to distinct aspects of mechanical property assessment. Moreover, it accommodates annexes for specific product types, including Bar Products, Tubular Products, Fasteners, Round Wire Products, and more, ensuring a holistic approach to testing.
ASTM E290 Standard Test Methods for Bend Testing of Material for Ductility
ASTM E290 is a destructive mechanical test standard that evaluates the ductility and structural soundness of metallic materials (and welds) by subjecting specimens to controlled bending deformationASTM International. It is a widely used quality control and qualification method for metals, alloys, and welded joints across industries.
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