CB/T 4368-2015 in English

VALID

Marine scupper on the bulkhead

Issued on:2015-04-30
Implemented on:2015-10-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $249.00
$242.00

Standard No:	CB/T 4368-2015
Document status:	VALID
Title in English:	Marine scupper on the bulkhead
Title in Chinese:	船用附壁式漏水口
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2015-04-30
Implemented on:	2015-10-01
ICS Classification:	47.020.30-Piping systems
Chinese Classification:	U55-Marine pipe fittings
Professional Classification:	CB-Watercraft
Related Keywords:	marine scupper bulkhead introduction technical background pn6 international ship supporting fs type gb/t pn6 domestic ship modification material technical requirements zinc layer protection requirements

Introduction

Technical background of the standard

As the key component specification for the open deck drainage system of steel ships, this standard is based on the evolution of the flange standards CB/T 4196-2011 and GB/T 2501-2010, and specifically strengthens the zinc layer protection requirements (CB/Z 343-2005) for seawater corrosion environment.

Core Parameters Comparison

Model	Flange Standard	Nominal Pressure	Typical Application
F Type	CB/T 4196	PN6	International Ship Supporting
FS Type	GB/T 2501	PN6	Domestic Ship Modification

Material Technical Requirements

The body is made of Q235A carbon steel (GB/T 700-2006), the short pipe needs to use 20# seamless steel pipe (GB/T 8163-2008), and the combination design of brass nut (H63) and steel stud effectively solves the electrochemical corrosion problem.

Key points for implementation

Type inspection must include full-item inspection of 3 samples
Unindicated tolerances shall be implemented in accordance with GB/T 1804-2000 m level
Welds shall be mechanically polished to Ra≤3.2μm

Technology evolution analysis

Compared with the old version of the standard, the 2015 version adds a FS type flange interface option to meet the needs of different ship types. At the same time, the zinc layer adhesion test requirements are strengthened, and it is clear that defects such as nodules and missing plating are not allowed after galvanizing.

More samples: GB 50021-2001(2009) JC/T 2453-2018 DL/T 5154-2012

Sample only — not a preview of CB/T 4368-2015