Standards

YB/T 5061-2007 Cold-rolled steel belt of carbon tool steel for watch manufacture

Publish Date: 2007-01-25

YB/T 5268-2007 Silica

Publish Date: 2007-01-25

YB/T 5051-2007 Calcium silicon alloy

Publish Date: 2007-01-25

YB/T 4001.1-2007 Steel bar grating and matching parts Part 1:Steel bar grating

This section specifies the structure, dimensions, technical requirements, design, installation, inspection rules, and packaging, marking, and quality certificates of steel grating plates (referred to as steel grating). For other types of steel grating and other metal grating not listed in this section, the relevant provisions of this section may be referred to for implementation. This section is widely used in industrial buildings, public facilities, device frames, platforms, floors, walkways, stair treads, ditch covers, fences, ceilings, etc. in industries such as petroleum, chemical industry, metallurgy, light industry, shipbuilding, energy, and municipalities.

Publish Date: 2007-01-25

YB/T 053-2007 core wire

Publish Date: 2007-01-25

YB/T 4072-2007 Blast furnace hot blast valve

This standard specifies the terms and models, specifications and parameters, technical requirements, inspection and testing, inspection rules, marking and packaging, storage and transportation, installation and use requirements of blast furnace hot air valves. This standard applies to blast furnace hot air valves with a system working pressure not exceeding 0.6 MPa, a working temperature not exceeding 1450°C, and a nominal diameter of DN500 to DN2200.

Publish Date: 2007-01-25

YB/T 4146-2006 High-carbon chrome bearing steel seamless steel tube

Publish Date: 2006-08-19

YB/T 4143-2006 Standard practice for testing homogeneity of materials for development of reference materials.

1.1 This standard is applicable to the inspection of the uniformity of metals, whether they are in solid form, powder form, or finely ground oxide materials, which are prepared to be used as reference materials in X-ray emission spectroscopy analysis, optical emission spectroscopy analysis, or both. However, the criteria for determining whether a standard sample is qualified must be predetermined by the user to meet their specific needs. 1.2 This standard is primarily designed for testing samples using X-ray emission spectroscopy or optical emission spectroscopy, or a combination of both methods. However, this rule can easily be applied to other instrumental methods such as atomic absorption spectrophotometry. 1.3 As long as the signal-to-background ratio is not a limiting factor, this standard can be applied to one or more elements in a sample. 1.4 This rule includes a method for correcting system drift or periodic (sinusoidal) drift in instruments over time by using a control reference material. Note 1: Note that if there are serious drifts (such as unstable power supplies, X-ray tubes, etc.), they can be detected from the data analysis. 1.5 This standard may involve hazardous materials, operations, and equipment. This standard does not intend to address all safety issues related to its use. It is the responsibility of the user to review and establish appropriate safety and hygiene rules and determine the scope of application before using this standard.

Publish Date: 2006-08-19

YB/T 4144-2006 Standard practice for establishing and controlling spectrochemical analytical curves

1.1 This standard provides guidance for the determination and control of spectral chemical analysis working curves. Although the determination of analysis working curves and daily control operations are interrelated, they should be considered separately. This rule applies to optical spectrometers with linear or logarithmic readout methods, optical spectrometers, and X-ray emission spectrometers. 1.2 However, this standard does not mean that it can be applied anywhere at will. Establishing appropriate, safe, and perfect application rules, and prioritizing the determination of the scope of use limited by this rule, are prerequisites for users of this standard to apply it.

Publish Date: 2006-08-19

YB/T 4019-2006 Test methods for chemical activity of caustic burned magnesia

This standard specifies the determination methods of the chemical activity of light-burned magnesium oxide and the determination methods of the content of active magnesium oxide, including the scope, instruments, reagents, sampling and sample preparation, determination methods, result calculation, and test reports. This standard is applicable to the determination of the activity of light-burned magnesium oxide with a particle size of less than 0.045 mm (passing through a 320-mesh sieve) or a particle size of less than 0.125 mm (passing through a 120-mesh sieve).

Publish Date: 2006-08-16

YB/T 4155-2006 Hot-rolled round carbon steel bars and rods for standard parts

Publish Date: 2006-08-16

YB/T 5125-2006 vanadium-containing iron castings

Publish Date: 2006-08-16