Subsea Bolt Performance Workshop Insights
NASEM Subsea Bolt
NASEM Subsea Bolt
Performance Workshop
Performance Workshop
April 11, 2017
April 11, 2017
Bolt Manufacturing –
Bolt Manufacturing –
A Look at Critical Operations
A Look at Critical Operations
Lester Burgess
Director of Technical Services and Quality
TSP/U.S. Bolt Manufacturing, Inc.
We will look at the following:
Forging / Forming
Heat Treatment
Machining (Threading)
Testing
Large bolt,
sectioned
lengthwise
showing
forged head
with large
internal crack
running
horizontally.
Internal crack
caused by
overheating
during
forging
operation.
The following are forging/hot heading parameters, as
applicable:
a) equipment;
b) heating method (furnace, induction);
c) temperature control (thermocouple, optical or
infrared pyrometer, fail safe cut-off);
d) times and temperatures;
e) dimensional control.
The manufacturer shall have a written forging
procedure defining, at a minimum, the parameters
defined in 5.4.3. When induction heating is used for
forging, the manufacturer’s equipment shall include
temperature monitoring equipment and an automatic
fail-safe system to prevent overheating.
Bolts must be heat
treated to achieve
proper strength by
cooling rapidly from
high temperature.
Nesting the parts
prevents uniform
cooling.
Random stacking of
the parts and
maximizing furnace
load is often used for
commercial bolting
but it is not
acceptable for critical
bolting.
The following are heat treat parameters, as applicable:
a) equipment (batch, continuous, induction,
direct resistance);
b) times and temperatures;
c) cooling media (e.g. type, polymer
concentration, quench temperature, agitation);
d) control and calibration methods;
e) maximum transfer time;
f) quench media start and finish temperature;
g) furnace load diagrams.
Furnace calibration shall be in accordance with API 6A,
Annex M; SAE AMS2750; or SAE AMSH6875.
Cross-section of threaded bolt with internal
bursts resulting from improper thread forming.
General Variables
The following are general variables, as
applicable:
◦
machining and threading equipment— single point
(lathe), multiple chaser, roll, cutting tap, form tap;
◦
machining and threading control methods.
Must be accurate – 20E requires compliance to ISO 17025.
Excerpt from ISO 17025 Accreditation Certificate:
Provides determination of actual properties
Confirms compliance to requirements
Cannot overcome inadequate processing:
◦
Not possible to test each part all properties
◦
Some defects are difficult or impossible to reveal
Testing an inadequately
controlled process can only
prove it bad, it cannot prove it
good.
Process Control
Delve into the critical operations of bolt manufacturing including forging, heat treatment, machining, and testing. Explore the parameters and procedures crucial for ensuring bolt quality and strength. Learn about common pitfalls to avoid in the manufacturing process to achieve optimal performance and reliability.
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Presentation Transcript
NASEM Subsea Bolt Performance Workshop April 11, 2017 NASEM Subsea Bolt Performance Workshop April 11, 2017 Bolt Manufacturing A Look at Critical Operations Bolt Manufacturing A Look at Critical Operations Lester Burgess Director of Technical Services and Quality TSP/U.S. Bolt Manufacturing, Inc. Lester Burgess Director of Technical Services and Quality TSP/U.S. Bolt Manufacturing, Inc. INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
We will look at the following: Forging / Forming Heat Treatment Machining (Threading) Testing INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
Large bolt, sectioned lengthwise showing forged head with large internal crack running horizontally. Internal crack caused by overheating during forging operation. INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
The following are forging/hot heading parameters, as applicable: a) equipment; b) heating method (furnace, induction); c) temperature control (thermocouple, optical or infrared pyrometer, fail safe cut-off); d) times and temperatures; e) dimensional control. The manufacturer shall have a written forging procedure defining, at a minimum, the parameters defined in 5.4.3. When induction heating is used for forging, the manufacturer s equipment shall include temperature monitoring equipment and an automatic fail-safe system to prevent overheating. INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
Bolts must be heat treated to achieve proper strength by cooling rapidly from high temperature. Nesting the parts prevents uniform cooling. Random stacking of the parts and maximizing furnace load is often used for commercial bolting but it is not acceptable for critical bolting. INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
The following are heat treat parameters, as applicable: a) equipment (batch, continuous, induction, direct resistance); b) times and temperatures; c) cooling media (e.g. type, polymer concentration, quench temperature, agitation); d) control and calibration methods; e) maximum transfer time; f) quench media start and finish temperature; g) furnace load diagrams. Furnace calibration shall be in accordance with API 6A, Annex M; SAE AMS2750; or SAE AMSH6875.
Cross-section of threaded bolt with internal bursts resulting from improper thread forming. INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
General Variables The following are general variables, as applicable: machining and threading equipment single point (lathe), multiple chaser, roll, cutting tap, form tap; General Variables machining and threading control methods. INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
Must be accurate 20E requires compliance to ISO 17025. Excerpt from ISO 17025 Accreditation Certificate: INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
Provides determination of actual properties Confirms compliance to requirements Cannot overcome inadequate processing: Not possible to test each part all properties Some defects are difficult or impossible to reveal Testing an inadequately controlled process can only prove it bad, it cannot prove it good. INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
Process Control INTELLECTUAL PROPERTY TSP/U.S. BOLT MANUFACTURING, INC.
