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GB/T 39655.1-2020 English PDF

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GB/T 39655.1-2020: Shipbuilding - Ship screw propellers - Manufacturing tolerances - Part 1: Propellers of diameter greater than 2.5 m
Status: Valid
Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 39655.1-2020244 Add to Cart 3 days Shipbuilding - Ship screw propellers - Manufacturing tolerances - Part 1: Propellers of diameter greater than 2.5 m Valid

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Basic data

Standard ID: GB/T 39655.1-2020 (GB/T39655.1-2020)
Description (Translated English): Shipbuilding - Ship screw propellers - Manufacturing tolerances - Part 1: Propellers of diameter greater than 2.5 m
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: U04
Classification of International Standard: 47.020.01
Word Count Estimation: 13,192
Date of Issue: 2020-12-14
Date of Implementation: 2021-07-01
Quoted Standard: ISO 1302
Adopted Standard: ISO 484-1-2015, IDT
Regulation (derived from): National Standard Announcement No. 28 of 2020
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the manufacturing tolerances of marine propellers with a diameter greater than 2.5 m.

GB/T 39655.1-2020: Shipbuilding - Ship screw propellers - Manufacturing tolerances - Part 1: Propellers of diameter greater than 2.5 m


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Shipbuilding, marine propellers, manufacturing tolerances, part 1: propellers with a diameter greater than 2:5m) ICS 47:020:01 U04 National Standards of People's Republic of China Manufacturing tolerances of ship propellers Part 1: Propellers with a diameter greater than 2:5m (ISO 484-1:2015, IDT) 2020-12-14 release 2021-07-01 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Foreword

GB/T 39655 "Tolerances for manufacturing ship propellers for shipbuilding" is divided into two parts: ---Part 1: Propellers with a diameter greater than 2:5m; ---Part 2: Propellers with a diameter of 0:8m to 2:5m: This part is Part 1 of GB/T 39655: This section was drafted in accordance with the rules given in GB/T 1:1-2009: The translation method used in this part is equivalent to the adoption of ISO 484-1:2015 ``Shipbuilding Marine Propeller Manufacturing Tolerance Part 1: Diameter greater than 2:5m propeller: The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows: ---GB/T 131-2006 Product Geometric Technical Specification (GPS) Representation of surface structure in technical product documentation (ISO 1302:2002, IDT): This part was proposed and managed by the National Ocean Shipping Standardization Technical Committee (SAC/TC12): Drafting organizations of this section: China State Shipbuilding Industry Research Institute, China Merchants Cruise Research Institute (Shanghai) Co:, Ltd:, Shanghai Overseas Takahashi Shipbuilding Co:, Ltd: The main drafters of this section: Cheng Nan, Zhu Jiashuai, Hu Xianfu, Luo Wenchen, Li Jianing, Ye Chao: Manufacturing tolerances of ship propellers Part 1: Propellers with a diameter greater than 2:5m

1 Scope

This part of GB/T 39655 specifies the manufacturing tolerances of marine propellers with a diameter greater than 2:5m: Note: In some cases, it is allowed to make some adjustments to the deviation based on the judgment of the customer or the designer and the customer:

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article Pieces: For undated references, the latest version (including all amendments) applies to this document: ISO 1302 Geometrical Product Specification (GPS) The representation of surface structure in technical product documents [GeometricalProduct Specifications(GPS)-Indicationofsurfacetextureintechnicalproductdocumentation]

3 Scope of application

This section applies to integral, combined fixed pitch propellers and controllable pitch propellers:

4 Pitch measurement method

4:1 The principle of the measurement method is to measure the length PQ corresponding to the predetermined angle α along the spiral of the radius r, and measure the points P and Q The height difference h relative to the reference surface (see Figure 1): The length of PQ is measured according to the method of 4:1:1, 4:1:2 or 4:1:3: Note: When necessary, other methods that meet the accuracy requirements can be used:
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