the nord-lock group pioneering safety - nflb | …nflb.no/wp-content/uploads/6.-nord-lock-as.pdf ·...

39

Upload: nguyentu

Post on 29-Apr-2018

216 views

Category:

Documents


1 download

TRANSCRIPT

Page 1: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &
Page 2: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

The Nord-Lock Group

PIONEERING SAFETY

Petter Viken

Business Developer – Oil & Gas

Page 3: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

The automotive industry showed that

23% of car problems relate to loose bolts

and 12% of all new cars have loose

bolts.*

Every 3rd week an incident due to failed

bolted joints occur on an offshore

installation on the Norwegien continental

shelf.**

*boltescience.com **oljefakta.no

Page 4: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Nuts and bolts are the world’s most common machine

elements and therefore the most common cause for

applications to…

• Fail

• Require maintenance

• Cause down-time

• Require corrective actions

… and thereby cause significant additional costs

Page 5: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Our mission is to safeguard your investments.

Our vision is to be your trusted global partner

in optimization of bolted connections.

Page 6: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Multifunctional wedge-locking

Wedge-locking solutions

Multi-jackbolt tensioners

Expansion bolting

Page 7: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Multifunctional Wedge-locking

Wedge-locking solutions

Multi-jackbolt tensioners

Expansion bolting

Wedge-locking

solutions

Washers Wheel nuts

Combi bolts Customer

specials

Page 8: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

m

Critical displacement threshold :

d = m . F0 . Lp

3

12 . Eb . I

Slipping force in the interface Fslipping = m . F0

Spontaneous bolt loosening (rotation of fastener)

Page 9: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

d = 4 µm

Critical displacement threshold :

d = m . F0 . Lp

3

12 . Eb . I

Slipping force in the interface

Fslipping = µ . F0

Numerical

application

Fslipping = 4500 N

d = 0,15 . 30000 . 103

12. 210000 . 64

. 104

Example:

M10 bolt

Preload : F0 = 30 000 N

Under head friction coefficient : µ = 0,15

Clamped thickness : Lp = 10 mm

Spontaneous bolt loosening (rotation of fastener)

Page 10: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

The principle

Page 11: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Installation

Page 12: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Verify a safe locking

1. Tighten joint

2. Make a mark

3. Untighten slowly

4. Sliding between

cam faces

5. Impression marks

Page 13: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Washer type Code

Steel washer EN 1.7182 / 1.7225 flZn General steel app.

Stainless steel EN 1.4404 / AISI 316L SS General stainless steel app.

Stainless steel SMO 254® 254 Salt water / Chlorides

Stainless steel Hastelloy® C-276 276 Acids

Stainless steel Inconel® 718 718 High temp / Cryogenic

Nord-Lockk

Control number-

Code-

Page 14: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Washers with increased outer diameter (SP)

Slotted holes

Flanged fasteners

Low strength materials (eg aluminium)

Coated / painted surfaces

Visual requirements

Page 16: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Bolted joint designed

with Life Cycle

Profitability mind set

Bolted joint designed

with component cost

mind set

Cost savings

Page 17: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Manufacturer of industrial components

Assemblies in numbers

Problem

Tightening aspect

Solution

Result

Investment cost

Reduction of tightenings

Fastener optimization (M10 M8)

Savings (per year)

ROI (1 year)

Not considered in calculation:

68 fastening points

60 units manufactured a week

Slackening and self-loosening.

Long tightening sequence:

- Snug tightening

- Final tightening

- Re-tightening on site before installation

68 bolts x 3 tightenings x 60 units x 50 weeks =

612 000 tightenings per year

- Nord-Lock redesigns the joint to a smaller diameter bolt

- Spec in Nord-Lock X-series washer

1 tightening per joint

EUR 47 229

EUR 122 400 / year (EUR 0,3 x 408 000 tightenings)

EUR 31 824

EUR 106 995

2,3

Time aspect: 4 hours of settlement time x 60 units x 52 weeks = 12480 unnecessary

production hours.

Return of

Investment

Case study

Page 18: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Transocean / AKER Solutions Nord-Lock washers

Tightening torque / sequence

Assembly instructions

No separation of clamped parts

No movement between clamped parts

No exceeding of the yield limit

Design within the fatigue limit

Sufficient corrosion resistance

Safe bolt securing device

Accurate tightening

Simplicity – Project on time

Page 19: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Materials

CE

EN 14399

ETA EN 1090

Eurocode

Page 20: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Eurocodes- a set of

harmonized technical rules

Eurocode 1

Eurocode 2

Eurocode 3

Eurocode 4

Eurocode 5

Eurocode 6

Eurocode 7

Eurocode 8

Eurocode 9

- Design of steel structures

- Mandatory since 2013-01-01

Page 21: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Eurocode 3

EN 1993

Steel structure is poorly described in EC3

• permanent structural steel members designed to

carry load

Utilize EN 1090-2

• to provide the requirements for a steel structure

Stipulate that a shear joint should be preloaded /

utilize bolt locking when subjected to:

• Impact

• Vibration

• Load reversal

A non-preloaded joint is a joint that does not require

preload and is tightened in a uncontrolled way. In

reality, some preload always exist.

Page 22: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Joint type (Shear) Loading Bolt grade

A) Bearing type Non-preloaded 4.6 – 10.9

(ISO 4014/16/17/18)

(EN 14399)

B) Slip resistant -

service

Preloaded 8.8-10.9

(EN 14399)

C) Slip resistant -

ultimate

Preloaded 8.8-10.9

(EN14399)

Joint type

(Tension)

Loading Bolt grade

D) Non-preloaded

Non-preloaded

4.6 – 10.9

(ISO 4014/16/17/18)

(EN 14399)

E) Preloaded Preloaded

8.8-10.9

(EN14399)

Page 23: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

EN 14399

- Structural fasteners

EN 14399- 1 / -10

High strength structural bolting assemblies for steel

structures

HR grade 8.8 / HV grade 10.9

Normally supplied in CE-marked sets comprised of:

• Bolt

• Nut

• 2 washers

• K-factor

EN 14399 fasteners cover all joint types (A, B, C, D, E)

Page 24: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

EN 1090

EN 1090-1

EN 1090-2

EN 1090-3

- Technical requirements for steel

structures

- Refers back to Eurocodes

- Allows bolts as:

• EN 14399 for pre / non-loaded joints

• EN 15048-1 for non-preloaded joints

(CE-marked ISO fasteners)

Page 25: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

EN 90 CE

Since 1993

Conformiteé Européenne

Means that a product conforms to EU-directives

A product can be sold within EES (includes

Norway)

25 product categories can be CE marked, fasteners

are not included as they are ISO and not EN

standardized

In this case bolts, nuts, washers are considered

building material and have a EN norm and CE

marking can be applied.

EN 14399 and EN 15048-1

Page 26: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

ETA

Nord-Lock has created a wedge-locking washer for

EN 14399 fasteners

ETA – European Technical Approval

DIBt has issued an ETA for Nord-Lock so called ”SC”

washers to be used with EN 14399 and still comply

with Eurocode 3, EN 1090

DIBt – Deutsches Institute für Bautechnik

Page 27: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Multifunctional Wedge-locking

Wedge-locking solutions

Multi-jackbolt tensioners

Expansion bolting

Bolt-style

tensioners

Nut-style

tensioners

Pre-designed

& specials

Flexnuts

Multi-jackbolt

tensioners (MJTs)

Page 28: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Principle of MJT

Distribute the total

torque over several

jack bolts

Tension the the main

thread

Page 29: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

MJT – Multi Jackbolt Tensioner

Cylindrical nut body Strong and compact design

Transfers the preload to the main

thread

Jackbolts Low tightening torque

High elasticity

Accurate friction conditions

Hardened Washer Protects the contact surface

Page 30: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Torque tightening

Page 31: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

No friction on the main stud Reuse of the studs

Maximization of possible axial load

(possible to use smaller bolts)

No fretting or seizure

Low torque Low cost hand tools

High precision in tightening = 1,2 (+/- 10% in obtained preload)

Precise assembly

Cost saving in construction

Optimization is possible

Example: M64x6 grade 8.8 at 1270 kN → 13 000 Nm

Superbolt → 315 Nm

Tightening benefits of MJT

Page 32: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Since no rotation occurs

between the main threads and

contact surface during

tightening:

Galling and seizure of threads

and fretting of bearing surface

is avoided

Fasteners can be

disassembled without being

damaged

Reuse of expensive fasteners

possible

Tightening benefits of MJT

Page 33: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Why is tightening so precise?

Very accurate friction conditions

under the jackbolts and in the

jackbolt threads (MoS2 or Graphite)

Very small friction radius

rf

Page 34: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

When tightened Nuts style MJT flex

Jackbolts compress (instead of

tension as with regular bolts)

The additional elasticity of a

SUPERBOLT = Prolongation

of the clamping length of 2-3

times the nominal bolt

diameter

Elastic behavior of MJT

Page 35: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Benefits of incline compensation

Hexagonal nut, Cylindrical hydraulic nut Bending moment in stud

Stress concentrations

Point contact

Stress corrosion

Risk of cracking

Creep

Lift off

No reuse of stud

High risk of failure

Superbolt Pure tension in stud

Full contact on bearing surface

No cracking

No creep

No stress corrosion

No lift off

Reuse of stud

Safe joint

Page 36: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Load distribution in MJT threads

Hexagonal nut

Cylindrical hydraulic nut Superbolt

Thread

Load

Thread Load

Page 37: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Tightening of MJT

3

7

1

2

4 3

1

2

4 3

50%

100%

100%

(20°)

Cross-wise tightening pattern

Only hand tools required

No special skills required

Tightening routine is very familiar for most staff

1-3 mm

Page 38: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

Untightening of MJT

Under no circumstances unload

single screws completely.

Apply penetraiting oil, especially

with any rust formation

Break loose each jackbolt in a

circular pattern

Then loosen until max. ¼ turn

Page 39: The Nord-Lock Group PIONEERING SAFETY - NFLB | …nflb.no/wp-content/uploads/6.-Nord-Lock-AS.pdf · The Nord-Lock Group PIONEERING SAFETY Petter Viken Business Developer – Oil &

www.nord-lock.com

HOW CAN WE ENHANCE

YOUR SAFETY?