Especificaciones para tuberias de acero

SYABAS’ STANDARD SPECIFICATION FOR PIPE LAYING WOKS
First Edition : May 2007

D - STEEL PIPES AND SPECIALS
1.0 1.1 GENERAL REQUIREMENTS Scope
This section of the Specifications covers the requirements for the manufacture and testing of welded steel pipes together with fittings complete with internal and external protection systems.

1.2

Definition
The following terms shall have the meaningshereby assigned to them except where the context clearly renders these meanings inapplicable. “Pipes” means straight pipes, whether whole or in cut lengths. “Fittings or pipe specials” means tees, bends, tapers, collars, flange adapters, blank flanges, expansion joints, mechanical joints, ring girders and similar accessories.

1.3

Standards and Codes of Practice
The following Standards and Codes ofPractice are referred to in this section of the Specification. The Standard or Codes shall be the latest edition current at the time of its preparation unless otherwise specified for particular application. API API API 5L 5LS 1104 Line pipe Spiral-weld line pipe Standard for welding pipelines and related facilities Methods for sampling and analysis of iron, steel and other ferrous metalsSpecification for Ordinary and Rapid Hardening Portland cement Steel pipes, fittings and specials for water, gas and sewage Methods of testing vulcanised rubber Specification for natural rubber compounds (high quality) Materials for elastomeric joint rings for pipework and pipeline
D.1

BS Handbook 21 BS 12 BS 534

BS 903 BS 1154 BS 2494

P:\shahrul\YHH\SPEC\PDF August 07\D-Steel Pipe&Special1.doc

SYABAS’STANDARD SPECIFICATION FOR PIPE LAYING WOKS
First Edition : May 2007

BS 2569 BS 4147 BS 4232 BS 4360/Part 2/2169 BS 4504 BS 5292 BS 5500 AWWA Mll BSEN 10025:93 BSEN 1092-1:2002

Sprayed metal coatings Hot applied bitumen based coatings for ferrous products Surface finish of blast-cleaned steel for painting Weldable structural steels Flanges and bolting for pipes, valves and Fittings Part I :Ferrous Jointing materials and compounds Unfired fusion welded pressure vessels Steel pipe design and installation Hot rolled products of non-alloy structure steel – Technical delivery condition Flanges and their joints – circular flanges for pipes, values, fittings and accessories PN designated. Part 1: Steel Flanges.

1.4

Submissions
The Contractor shall provide drawings, calculations and data inrespect of the following:For pipes and fittings: drawings with descriptions to show the method of forming pipes and fittings in standard lengths from steel sheets or strip

For joints: drawings for spigot and socket joints showing allowable tolerances and arrangements to permit air testing of completed joins on Site.

For welding procedure : details of plant, methods, materials , make and size ofelectrodes, number of runs and current strength for each type of weld.

For internal lining : full details of method of lining and curing including details and sieve analysis of materials to be used and type of cement.
D.2

P:\shahrul\YHH\SPEC\PDF August 07\D-Steel Pipe&Special1.doc

SYABAS’ STANDARD SPECIFICATION FOR PIPE LAYING WOKS
First Edition : May 2007

For internal coating : full detailsof coating process to be used, including details of the bitumen and the inner and outer wrappings.

2.0 2.1

GENERAL REQUIREMENTS OF PIPES AND FITTINGS Pipes and Fittings
All pipes and fittings shall be provided by the Contractor and delivered to the Site. Unless otherwise shown or specified, the Contractor shall at his own cost, supply all pipes and fittings required for the works and should benew and of makes approved by SYABAS. Each items supplied shall be suitably marked to permit identification with items in the Bill of Quantities.

2.2

Steel Pipes
Steel pipes shall be manufactured, except where stated otherwise hereunder, in accordance with API Specification 5L or API Specification 5LS. Material for pipes shall be made from carbon steel plate to Grade 43A of BS 4360 Part 2 1969...