Center Certification & Testing International
basic introduction
For metal castings, parts, fasteners, valves, springs and other products, ZRLK provides professional and accurate testing and analysis services. Based on the appearance dimensions, mechanical properties, life testing and other aspects of metal parts, according to various testing standards, ZRLK provides Authoritative third-party test report.
Testing service
Metal parts inspection
Spring testing, gear testing, bearing testing, etc.
Fastener testing
Bolts, screws, nuts, studs, screws, rivets, washers, retaining rings, welding nails, etc.
Metal casting inspection
Steel castings, cast irons, copper castings, aluminum castings, magnesium castings, zinc castings, titanium castings, etc.; grey iron castings, ductile iron castings, vermicular graphite iron castings, malleable iron castings, alloy iron castings, etc.; doors Handles, door locks, radiators, plumbing pipes, iron pans, gas stoves, irons, etc.
Valve inspection
High-pressure valve, vacuum valve, fire valve, plumbing valve, hydraulic valve, valve flange, copper valve, water valve, etc.
Spring detection
Gas spring, compression spring, spring washer, air spring, automobile spring, spring shock absorber, diaphragm spring, light weight spring, suspension eccentric spring, leaf spring, valve spring, floor spring, spring mattress, coil spring, stainless steel Springs, wave springs, torsion springs, safety valve springs, compression springs, butterfly springs, torque springs, carbon springs, rubber springs, alloy springs, etc.
Test items
Appearance size: thread pass and stop gauge, roughness, various length sizes.
Mechanical properties: (cloth, Luo, Wei) hardness, re-tempering test, (normal temperature, high temperature) tensile test, static load anchoring, guaranteed load, various effective moments, locking performance, torque coefficient, tightening axial force, Friction coefficient, anti-slip coefficient, screw-in test, gasket elasticity, toughness, hydrogen embrittlement test, flattening, flaring, flaring test, bending, (single side, double side) shear test, pendulum impact, pressure Test etc.
Life test: fatigue test, salt spray test, stress relaxation, high temperature creep, stress endurance test, etc.
Valve testing items: non-destructive testing, pressure testing, air tightness testing, tri-sex testing, anti-corrosion testing, factory testing, material testing, hardness, performance testing, magnetic particle testing, flow testing, etc.
Spring testing items: mechanical properties testing, pressure testing, stiffness testing, hardness testing, physical properties testing, fatigue testing, elastic testing, permanent deformation testing, damping testing, fracture failure analysis, corrosion resistance testing, load characteristics testing, tensile strength, Flaw detection, metallographic detection, steel wire detection, parallelism detection, perpendicularity detection, air tightness detection, etc.
Testing standards
GB/T 3098.2-2000 Mechanical properties of fasteners Nut coarse thread
GB/T 3098.3-2000 Fastening screws for mechanical properties of fasteners
GB/T 3098.4-2000 Mechanical properties of fasteners, fine thread of nuts
GB/T 3098.5-2000 Fastener mechanical performance self-tapping screw
GB/T 3098.6-2000 Mechanical properties of fasteners Stainless steel bolts, screws and studs
GB/T 3098.7-2000 Fastener mechanical properties self-extruded screws
GB/T 3098.14-2000 Fastener mechanical performance nut expansion test
GB/T 3098.15-2000 Mechanical properties of fasteners Stainless steel nuts
GB/T 3098.16-2000 Mechanical properties of fasteners Stainless steel set screws
GB/T 5779.1-2000 General requirements for bolts, screws and studs with surface defects on fasteners
GB/T 5779.2-2000 fastener surface defect nut
GB/T 5779.3-2000 Particular requirements for bolts, screws and studs with fastener surface defects
GB/T 2-2001 End of external thread parts of fasteners
GB/T 3098.11-2002 Mechanical properties of fasteners Self-drilling self-tapping screws
GB/T 3103.1-2002 Tolerances for fasteners bolts, screws, studs and nuts
Our advantage
1. With a professional qualification and experienced expert technical team, we can provide you with professional consultation and services.
2. Have advanced laboratory equipment to ensure the accuracy and reliability of test data.
3. As a third-party testing and certification organization trusted by customers worldwide, we are your certificate of quality.
SRRC certification is one of the necessary conditions for products to enter the Chinese market for sale. It ensures that the wireless transmission characteristics of the wireless camera comply with national standards, avoiding communication problems caused by radio interference and ensuring the legality and compliance of the product.
FCC certification is a mandatory requirement for wireless device certification in the US market. Through FCC ID certification, wireless microphones can prove their compliance with US radio transmission standards, avoiding market bans or fines for violations. This is particularly important for products that hope to be sold in the US market.
KC certification ensures that products comply with relevant laws, regulations, and safety standards in South Korea, and is a necessary condition for smart door lock products to enter the South Korean market. KC certification covers wireless radio frequency, electromagnetic compatibility, and electromagnetic exposure. Strict testing and evaluation are required to obtain KC certification before products can be legally sold in the Korean market and gain consumer trust.
For metal castings, parts, fasteners, valves, springs and other products, ZRLK provides professional and accurate testing and analysis services. Based on the appearance dimensions, mechanical properties, life testing and other aspects of metal parts, according to various testing standards, ZRLK provides Authoritative third-party test report.
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