GB 11946-2013Thermally toughened safety glass for ships (English PDF)

6.1 appearance quality

Appearance quality marine tempered safety glass shall comply with the requirements of Table 1.

Table 1 Appearance quality

Defects name

Quality requirements

Description Allows the number of defects

Point-like defects

0.3mm<= size <=0.5mm 2 × S

Size of > 0.5mm allowed to exist

Point-like defect density

Point-like defect size >=0.3mm minimum distance not less than 200mm; any one of the inner circle diameter 50mm Dimensions

>=0.1mm point-like defects is not more than 2

Scratch width <=0.1mm; length <=40mm 2 × S

Explosion edge

Allow per meter on a side having a length of not more than 10mm, since the glass edge to the glass table

Surface extends deeper than 2mm, since the thickness of the glass plate for extending not more than 1/3

Critical edge

Stones, cracking, chipping allowed to exist

Note. S is the area in square glass plate as a unit of value, according to GB/T 8170 rounding, to two decimal places. The number of defects for the coefficient S

The value obtained by multiplying, according to GB/T 8170 rounded to integer.

6.2 Dimensions and tolerances

6.2.1 rectangular window toughened safety glass length and width and thickness shall be as defined in Figure 1 and Table 2.

Explanation.

w --- width of the glass;

h --- length glass;

t --- nominal thickness of the glass;

r --- glass fillet radius.

6.2.3 Other Sizes

Tables 2 and 3 are not included in the size, the size of deviation agreed by both parties.

Thickness deviation should be consistent with the provisions in Table 3.

6.3 Edge processing

Glass should be finely ground and chamfered edge (see Figure 3), Setback to comply with Table 4.

Explanation.

t --- nominal thickness of the glass;

y --- Setback.

Figure 3 Side Process schematic

Table 4 Setback in millimeters

Setback glass thickness t y

6 8 10 <=1.5

12 15 19 <=2.0

6.4 Parallelism

Glass sides are parallel should not exceed 0.03%.

6.5 curvature

Curvature should not exceed 0.2%.

6.6 Stamping strength

It should not be damaged and broken glass.

6.7 visible light transmittance

Marine tempered safety glass visible light transmittance to comply with Table 5.

Table 5 light transmittance

Parts of the visible light transmittance

Cab, observation room >=70%

Other supply and demand sides agreed

6.8 Optical distortion

Marine tempered safety glass optical distortion shall be in accordance with Table 6.

Table 6 optical distortion

Parts of the optical distortion/( ')

Cab, observation room <=2

Other supply and demand sides agreed

Note. Regional do test requirements within the article edge 25mm range.

6.9 surface stress

Marine surface stress toughened safety glass should not be less than 90MPa.

7.1 appearance quality

In a sample of products, under good natural light scattering and light conditions, away from the sample surface at a 600mm visual inspection. use

In line with JB/T 2369 provisions ruled reading microscope measurement point-like defects and scratches the maximum size of the width is 0.01mm. Make

The indexing in line with GB/T 9056 provisions is 1mm metal ruler to measure the minimum distance between two o'clock like defects, scratches and burst side length.

7.2 Dimensions and tolerances

In the article is a sample. Length, width and diameter of the glass using the minimum scale value of 1mm, in line with GB/T 9056 provisions steel ruler

Or in compliance with the provisions of the steel tape measure. Found with the nominal size of the difference is the size of the deviation.

Thickness conforming outside micrometer or above and have the same measuring accuracy of GB/T 1216 provisions into the center of the four sides of the glass plate

Line measurements, the mean value, the value after rounding to one decimal place. Found nominal thickness is the difference between the thickness deviation.

Chamfered edges Steel ruler measuring compliance with GB/T 9056 regulations.

7.3 Parallelism

Micrometer or conforming with this same precision instruments to measure the thickness of the glass sides of the midpoint of the foreign economic one thousand GB/T 1216 provisions (see

Figure 4), tempered safety glass portholes in every 1/4 weeks strengths of the measuring point (see Figure 5). Rectangular window toughened safety glass with a relative degree of parallelism results

Divided by the difference between the maximum thickness of the edge adjacent Collage long representation of the results, see equation (1). Tempered safety glass portholes parallelism results with two relatively thick

Divided by the difference between the maximum diameter of the representation of the results, see formula (2).

7.4 curvature

In the article is a sample. The sample stand up vertically, with a foot or wire level has been close to both sides or the diagonal direction of the article, measured with a feeler

The amount of straight edge and the gap between the glass and the percentage ratio of the length of the height of the arc and the chord is represented curvature [see Figure 6 and the formula (3)].

7.5 Stamping strength

In article as a sample, take four samples tested. Test methods and procedures according to GB/T 3385 carried out.

7.6 visible light transmittance

In article as a sample, take three samples tested. Test methods and procedures carried out in accordance with GB/T 5137.2-2002 Chapter 4.

7.7 Optical distortion

In article as a sample, take four samples tested. Test methods and procedures carried out in accordance with GB/T 5137.2-2002 Chapter 6.

7.8 surface stress

In article as a sample, take three samples tested. Test method and steps in accordance with GB 15763.2-2005 6.8.

8.1 Inspection classification

Inspection is divided into the factory inspection and type testing.

8.2 Test Project

Marine tempered safety glass inspection items, requirements and test methods shall be in accordance with Table 7.

Table 7 test items, requirements and test methods

Project type test factory inspection

Claim

Steel rectangular window

Safety glass

Steel portholes

Safety glass

experiment method

Appearance quality sqrt sqrt 6.1 6.1 7.1

Dimensions and tolerances sqrt sqrt 6.2.1 6.2.2 7.2

Table 7 (continued)

Project type test factory inspection

Claim

Steel rectangular window

Safety glass

Steel portholes

Safety glass

experiment method

Edge Processing sqrt sqrt 6.3 6.3 7.2

Parallelism - sqrt 6.4 6.4 7.3

Curvature sqrt sqrt 6.5 6.5 7.4

Punching strength - sqrt 6.6 6.6 7.5

Visible light transmittance - sqrt 6.7 6.7 7.6

Optical distortion - sqrt 6.8 6.8 7.7

Surface stress - sqrt 6.9 6.9 7.8

NOTE. sqrt expressed the need for detection. - means no items seized.

8.3 factory inspection

8.3.1 Test items

Factory inspection items are shown in Table 7.

8.3.2 Sampling Method

Marine tempered safety glass factory inspection sampling plan shall comply with the requirements in Table 8. When the batch quantities greater than 500, per

500 1 batch batch extract samples. When the test items for non-destructive testing is available to detect it continues to other projects.

Table 8 sampling plan for the unit block

Bulk sample size range unqualified acceptance number to determine the number

8.3.3 determination

8.3.3.1 individual judgment

Such as the appearance of quality, dimensions and tolerances, number of rejects edge processing, curvature greater than or equal Table 8 failed to determine the number, recognize

The quality of the batch for the appearance, size and tolerances, edge processing or curvature failed.

8.3.3.2 total judgment

Appearance quality, dimensions and tolerances, edge processing, bending meet the requirements, then consider the product factory inspection, otherwise not

qualified.

8.4 Type inspection

8.4.1 General

When one of the following conditions, type of inspection should be carried out.

--- New products or old products to the plant production trial to identify stereotypes;

--- After the trial production, such as structure, materials, technology has drastically changed, it may affect product performance;

--- Normal production at least 1 year;

--- Product discontinuation more than six months, the production recovery;

--- Test results are quite different when the last type inspection.

8.4.2 Test items

Type test items are shown in Table 7.

8.4.3 Sampling Method

8.4.3.1 appearance quality, dimensions and tolerances, edge processing, bending

With 8.3.2.

8.4.3.2 Parallelism

In the same thicknesses, the same kind of technology as a group, randomly selected from a batch of products tested. When the batch quantities greater than 500

When, every 500 to 1 batch batch extract samples.

8.4.3.3 punching strength, light transmittance, optical distortion, surface stress

According to the number of test items required from the batch of products at random.

8.4.4 determination

8.4.4.1 appearance quality, dimensions and tolerances, edge processing, bending

With 8.3.3.1.

8.4.4.2 Parallelism

All samples meet the requirements for qualified, otherwise unqualified.

8.4.4.3 punching strength

All samples meet the requirements for qualified, when the two samples do not meet, for the failure; when a specimen is not met, then an additional four test

Thus, to meet all the requirements for the qualification.

8.4.4.4 visible light transmittance, optical distortion, surface stress

All samples meet the requirements for qualified, otherwise the project failed.

8.4.5.5 total judgment

If the performance is satisfactory, considered qualified product type test, otherwise unqualified.

9.1 mark

Marine toughened safety glass body on signs shall comply with GB/T 3385 requirements.

9.2 Packaging

Glass packaging should adopt wooden box or container (rack) packaging, box (frame) should be easy handling, transportation. Each box (frame) should be installed in the same thickness, feet

Inch glass. Between the glass and the glass should be taken between the glass and the box (frame) protective measures to prevent scratches and damage the glass surface of the glass.

Packaging and marking shall comply with the relevant national standards, each container should be marked with the product name, the glass thickness, type, production plant, the site

And registered trademarks, and printed with "up, put a positive light to move carefully broken, fear of wet rain" and other words or signs. Each package should co-product testing

Grid certificate.

9.3 Transport

Transport, the glass should be fixed firmly to prevent sliding dumping measures should be rain.

9.4 Storage

The product should be stored in a place there is rain facilities.

END: Draft Version (GB 11946-2013)