
Description
1731 Chain pipe Wrench-A | |||
NO. | SIZE | NO. | SIZE |
173101 | 300×50mm | 173103 | 600×100mm |
173102 | 300×100mm | 173104 | 600×150mm |
1732 Chain pipe Wrench-B | |||
NO. | SIZE | NO. | SIZE |
173201 | 900×100mm | 173208 | 1000×300mm |
173202 | 900×150mm | 173209 | 1200×200mm |
173203 | 900×200mm | 173210 | 1200×250mm |
173204 | 900×250mm | 173211 | 1200×300mm |
173205 | 1000×150mm | 173212 | 1300×250mm |
173206 | 1000×200mm | 173213 | 1300×300mm |
173207 | 1000×250mm | 173214 | 1400×320mm |
Non sparking tools is also called safety tools or explosion proof tools.There are two types of materials.
1,Aluminum bronze,Al-Cu,aluminum,nickel,manganese,iron and other metals were added to the high purity electrolytic copper as matrix to form copper-based alloy.
2,Beryllium copper,Be-Cu,the copper base alloy was forming by adding some metals such as beryllium,nickel.
The thermal and electrical conductivity of these two materials are very good,beryllium bronze is non-magnetic and can be used in strong magnetic fields.
Explosion proof tools can be divided in two catagories by manufacturing process.
1.Cast,is a kind of traditional technique,it is an international technology for manufacturing explosion proof tools in 1980s.
Advantages of casting process: simple process,lower manufacturing cost.
Disadvantages: product density,hardness,tensile strength,low torque,more pores and trachoma lead to shorter service life.
2.Forging,is a kind of international manufacturing technology.Products can be made one-time forging by large press or punch press with heat-resistant forming die.
Advantages:greatly improved the performance in product density,hardness,tensile strenth,torque,basically eliminate porosity,trachoma.The machanical properties of products service life than traditional casting process 1 times.
Disavantages: product equipments,mold development,resulting higher cost.
Technical
Be-Cu | |
Green lake, GBEX IC,for hydrogen with concentration 21.0+2.0%. | |
Hardness | HRC35 |
Tensile strength | δ b 105-120kgf/mm² |
Al-Cu | |
Bluish yellow, GBEX IIB, for ethylene with concentration 7.8+0.5% | |
Hardness | HRC25 |
Tensile strength | δ b 75-85kgf/mm² |

1732 Chain pipe wrench (B)
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